metal-organic compounds
Hydrogen-bonded sheets in racemic cis-(2,2′-bipyridyl-κ2N,N′)oxo(pentane-2,4-dionato-κ2O,O′)(thiocyanato-κN)vanadium(IV)
aSchool of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India, bDepartment of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland, and cSchool of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland
*Correspondence e-mail: cg@st-andrews.ac.uk
The title compound, [V(C5H7O2)(NCS)O(C10H8N2)], crystallizes with Z′ = 2 in the Pbca. The molecules are linked into sheets by a combination of four C—H⋯O hydrogen bonds and one C—H⋯N hydrogen bond. The four C—H⋯O hydrogen bonds generate chains of rings, where each chain contains just a single enantiomer of each of the two independent molecules, while the C—H⋯N hydrogen bond generates a chain containing both enantiomers of just one of the independent molecules.
Comment
The reactions of tris(pentane-2,4-dionato)vanadium(III) with salts of 2,2′-bipyridine and 1,10-phenanthroline containing non-coordinating anions have been used to prepare six-coordinate mixed-ligand complexes of vanadium (Kavitha et al., 2006, 2006a). In an attempt to prepare seven-coordinate VIII complexes using salts containing coordinating anions, the reaction of tris(pentane-2,4-dionato)vanadium(III) with 2,2′-bipyridinium thiocyanate was carried out. This resulted in the formation of the title compound, (I), an oxidized six-coordinate mixed-ligand complex of vanadium(IV).
Compound (I) (Fig. 1) crystallizes with Z′ = 2 in the Pbca. The oxo and thiocyanate ligands occupy mutually cis sites in both of the independent molecules, so that these molecules are chiral although the compound is racemic. The centrosymmetric accommodates equal numbers of Λ and Δ enantiomers, and in the selected both molecules have the Λ configuration.
Because of the chemical hardness of the vanadium(IV) centre, the thiocyanate ligand coordinates via the N atom rather than via the S atom. The interbond angles at vanadium indicate some distortion from the ideal octahedral geometry and this may be dominated by the rather small bite angles (Table 1) characteristic of the bipyridyl ligands. The key bond distances and angles within the two independent molecules are very similar; in particular, both molecules contain VNCS fragments which are nearly linear.
Molecules of (I) are linked into complex sheets by a combination of four C—H⋯O hydrogen bonds and one C—H⋯N hydrogen bond (Table 2). The sheet formation is readily analysed in terms of two one-dimensional substructures, one involving all of the C—H⋯O hydrogen bonds and the other depending on just the single C—H⋯N hydrogen bond. Within the selected atoms C53 and C63 flanking the bay region of the bipyridyl ligand in the type 2 molecule (containing atom V2) both act as hydrogen-bond donors to atom O1 in the type 1 molecule (containing atom V1). In addition, atoms C13 and C23 flanking the bay region of the bipyridyl ligand in the type 1 molecule at (x, y, z) both act as hydrogen-bond donors to atom O2 in the type 2 molecule at (1 − x, + y, − z), so forming a complex chain of alternating chelate and hydrogen-bonded rings running parallel to the [010] direction and generated by the 21 screw axis along (, y, ) (Fig. 2). Four chains of this type, each of which includes both type 1 and type 2 molecules, run through each The chains generated by the screw axes along (0, y, ) and (, y, ) include only the Λ enantiomers, while those along (0, y, ) and (, y, ) include only the Δ enantiomers. We may note here the contrast between the hydrogen-bonding behaviour of compound (I), where each of the independent oxo ligands acts as a double acceptor of C—H⋯O hydrogen bonds, and that of the analogous compound (II) (see scheme), where the oxo ligand plays no part in the hydrogen bonding (Kavitha et al., 2006b).
The second x, y, z) acts as hydrogen-bond donor to thiocyanate atom N81 in the type 2 molecule at (− + x, y, − z), so forming a simple C(6) (Bernstein et al., 1995) chain of alternating Λ and Δ enantiomers running parallel to the [100] direction and generated by the a-glide plane at z = (Fig. 3).
includes only the type 2 molecules, but both enantiomers of this molecule are present in each chain. Atom C72 of the pentanedionate ligand in the type 2 molecule at (The combination of these [100] and [010] chains generates a complex (001) sheet. Two such sheets, related to one another by inversion and lying in the domains 0 < z < and < z < 1 pass through each but there are no direction-specific interactions between adjacent sheets. In particular, C—H⋯π(arene) hydrogen bonds and π–π stacking interactions are both absent from the structure of (I).
Experimental
A mixture containing equimolar quantities of 2,2′-bipyridinium thiocyanate and tris(pentane-2,4-dionato)vanadium(III) in methanol was heated under reflux for 3 h in a dinitrogen atmosphere. The mixture was cooled to ambient temperature and the solvent was removed under reduced pressure to yield crystals of (I) (m.p. 401 K) suitable for single-crystal X-ray diffraction analysis.
Crystal data
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Refinement
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The Pbca was uniquely assigned from the All H atoms were located in difference maps and subsequently treated as riding atoms, with C—H distances of 0.95 (ring H) or 0.98 Å (methyl H), and with Uiso(H) = 1.2Ueq(C), or 1.5Ueq(C) for the methyl groups.
Data collection: COLLECT (Nonius, 1999); cell DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; program(s) used to solve structure: OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: OSCAIL and SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PRPKAPPA (Ferguson, 1999).
Supporting information
10.1107/S0108270106008158/fa3005sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock 1348. DOI: 10.1107/S0108270106008158/fa3005Isup2.hkl
A mixture containing equimolar quantities of 2,2'-bipyridinium thiocyanate and tris(pentane-2,4-dionato)vanadium(III) in methanol (Volume?) was heated under reflux for 3 h in a dinitrogen atmosphere. The mixture was cooled to ambient temperature and the solvent was removed under reduced pressure to yield crystals of (I) (m.p. 401 K) suitable for single-crystal X-ray diffraction.
The
Pbca was uniquely assigned from the All H atoms were located in difference maps and subsequently treated as riding atoms, with C—H distances of 0.95 (ring H) or 0.98 Å (methyl H), and with Uiso(H) = 1.2Ueq(C), or 1.5Ueq(C) for the methyl groups.Data collection: COLLECT (Nonius, 1999); cell
DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; program(s) used to solve structure: OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: OSCAIL and SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PRPKAPPA (Ferguson, 1999).[V(C5H7O2)(NCS)O(C10H8N2)] | F(000) = 3120 |
Mr = 380.32 | Dx = 1.469 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 7898 reflections |
a = 15.0522 (10) Å | θ = 3.0–27.6° |
b = 29.721 (2) Å | µ = 0.72 mm−1 |
c = 15.3753 (10) Å | T = 120 K |
V = 6878.4 (8) Å3 | Plate, brown |
Z = 16 | 0.18 × 0.10 × 0.04 mm |
Nonius KappaCCD area-detector diffractometer | 7898 independent reflections |
Radiation source: Bruker-Nonius FR591 rotating anode | 5904 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.064 |
Detector resolution: 9.091 pixels mm-1 | θmax = 27.6°, θmin = 3.0° |
ϕ and ω scans | h = −19→19 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | k = −32→38 |
Tmin = 0.882, Tmax = 0.972 | l = −19→14 |
40301 measured reflections |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.135 | H-atom parameters constrained |
S = 1.13 | w = 1/[σ2(Fo2) + (0.0615P)2 + 3.5919P] where P = (Fo2 + 2Fc2)/3 |
7898 reflections | (Δ/σ)max = 0.002 |
437 parameters | Δρmax = 0.77 e Å−3 |
0 restraints | Δρmin = −0.69 e Å−3 |
[V(C5H7O2)(NCS)O(C10H8N2)] | V = 6878.4 (8) Å3 |
Mr = 380.32 | Z = 16 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 15.0522 (10) Å | µ = 0.72 mm−1 |
b = 29.721 (2) Å | T = 120 K |
c = 15.3753 (10) Å | 0.18 × 0.10 × 0.04 mm |
Nonius KappaCCD area-detector diffractometer | 7898 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | 5904 reflections with I > 2σ(I) |
Tmin = 0.882, Tmax = 0.972 | Rint = 0.064 |
40301 measured reflections |
R[F2 > 2σ(F2)] = 0.053 | 0 restraints |
wR(F2) = 0.135 | H-atom parameters constrained |
S = 1.13 | Δρmax = 0.77 e Å−3 |
7898 reflections | Δρmin = −0.69 e Å−3 |
437 parameters |
x | y | z | Uiso*/Ueq | ||
V1 | 0.52076 (3) | 0.798315 (16) | 0.16865 (3) | 0.02076 (13) | |
N11 | 0.52526 (15) | 0.86252 (8) | 0.10674 (14) | 0.0197 (5) | |
C12 | 0.47449 (19) | 0.89680 (9) | 0.13600 (18) | 0.0204 (6) | |
C13 | 0.4843 (2) | 0.94011 (10) | 0.10331 (19) | 0.0256 (6) | |
C14 | 0.5487 (2) | 0.94829 (11) | 0.0408 (2) | 0.0307 (7) | |
C15 | 0.5991 (2) | 0.91312 (10) | 0.01032 (19) | 0.0268 (7) | |
C16 | 0.58562 (19) | 0.87054 (10) | 0.04437 (17) | 0.0230 (6) | |
N21 | 0.41335 (15) | 0.84132 (8) | 0.23061 (14) | 0.0192 (5) | |
C22 | 0.41112 (18) | 0.88490 (9) | 0.20652 (17) | 0.0195 (6) | |
C23 | 0.3556 (2) | 0.91580 (10) | 0.24666 (19) | 0.0253 (6) | |
C24 | 0.2994 (2) | 0.90111 (10) | 0.3126 (2) | 0.0277 (7) | |
C25 | 0.2994 (2) | 0.85623 (10) | 0.33566 (19) | 0.0268 (7) | |
C26 | 0.35835 (19) | 0.82752 (10) | 0.29325 (18) | 0.0238 (6) | |
O31 | 0.59368 (13) | 0.82799 (7) | 0.26101 (13) | 0.0259 (5) | |
C31 | 0.6188 (2) | 0.81164 (10) | 0.33379 (19) | 0.0251 (6) | |
C34 | 0.6823 (2) | 0.84006 (11) | 0.3850 (2) | 0.0303 (7) | |
C32 | 0.5909 (2) | 0.76998 (10) | 0.36604 (19) | 0.0278 (7) | |
C33 | 0.5297 (2) | 0.74235 (10) | 0.32647 (19) | 0.0259 (7) | |
C35 | 0.4993 (2) | 0.69980 (10) | 0.3694 (2) | 0.0348 (8) | |
O33 | 0.49292 (14) | 0.75009 (7) | 0.25190 (13) | 0.0257 (5) | |
N41 | 0.41804 (17) | 0.77590 (8) | 0.09326 (16) | 0.0252 (5) | |
C42 | 0.3637 (2) | 0.76178 (10) | 0.04682 (19) | 0.0241 (6) | |
S1 | 0.28690 (5) | 0.74249 (3) | −0.01827 (5) | 0.03099 (19) | |
O1 | 0.60029 (14) | 0.77894 (7) | 0.11034 (14) | 0.0303 (5) | |
V2 | 0.59410 (3) | 0.549682 (16) | 0.24244 (3) | 0.01996 (13) | |
N51 | 0.66776 (15) | 0.61127 (8) | 0.24765 (15) | 0.0200 (5) | |
C52 | 0.64396 (19) | 0.64672 (9) | 0.19636 (18) | 0.0210 (6) | |
C53 | 0.6871 (2) | 0.68780 (10) | 0.2023 (2) | 0.0278 (7) | |
C54 | 0.7551 (2) | 0.69311 (11) | 0.2620 (2) | 0.0335 (8) | |
C55 | 0.7791 (2) | 0.65739 (10) | 0.3136 (2) | 0.0293 (7) | |
C56 | 0.73473 (19) | 0.61711 (10) | 0.30447 (19) | 0.0241 (6) | |
N61 | 0.53822 (15) | 0.59517 (8) | 0.13808 (15) | 0.0218 (5) | |
C62 | 0.57117 (18) | 0.63750 (9) | 0.13419 (18) | 0.0208 (6) | |
C63 | 0.5395 (2) | 0.66882 (10) | 0.07525 (19) | 0.0275 (7) | |
C64 | 0.4733 (2) | 0.65594 (12) | 0.0170 (2) | 0.0326 (7) | |
C65 | 0.4417 (2) | 0.61260 (11) | 0.0190 (2) | 0.0319 (7) | |
C66 | 0.4755 (2) | 0.58330 (11) | 0.0809 (2) | 0.0295 (7) | |
C71 | 0.4218 (2) | 0.56737 (11) | 0.3294 (2) | 0.0277 (7) | |
O71 | 0.50142 (13) | 0.58021 (7) | 0.31432 (13) | 0.0264 (5) | |
C72 | 0.3823 (2) | 0.52927 (11) | 0.2919 (2) | 0.0315 (7) | |
C74 | 0.3692 (2) | 0.59632 (12) | 0.3911 (2) | 0.0350 (8) | |
C73 | 0.4250 (2) | 0.49928 (10) | 0.2374 (2) | 0.0274 (7) | |
C75 | 0.3782 (2) | 0.45833 (11) | 0.2036 (2) | 0.0377 (8) | |
O73 | 0.50604 (13) | 0.50349 (7) | 0.21239 (13) | 0.0267 (5) | |
N81 | 0.66381 (16) | 0.52564 (8) | 0.13924 (16) | 0.0248 (5) | |
C82 | 0.6893 (2) | 0.51166 (10) | 0.0733 (2) | 0.0258 (6) | |
S2 | 0.72969 (6) | 0.49344 (3) | −0.01820 (5) | 0.0394 (2) | |
O2 | 0.65087 (14) | 0.52728 (6) | 0.31975 (13) | 0.0271 (5) | |
H13 | 0.4473 | 0.9638 | 0.1235 | 0.031* | |
H14 | 0.5579 | 0.9779 | 0.0193 | 0.037* | |
H15 | 0.6426 | 0.9180 | −0.0335 | 0.032* | |
H16 | 0.6202 | 0.8462 | 0.0229 | 0.028* | |
H23 | 0.3559 | 0.9465 | 0.2294 | 0.030* | |
H24 | 0.2614 | 0.9218 | 0.3415 | 0.033* | |
H25 | 0.2602 | 0.8452 | 0.3792 | 0.032* | |
H26 | 0.3595 | 0.7967 | 0.3097 | 0.029* | |
H34A | 0.6524 | 0.8677 | 0.4037 | 0.045* | |
H34B | 0.7336 | 0.8477 | 0.3486 | 0.045* | |
H34C | 0.7025 | 0.8233 | 0.4362 | 0.045* | |
H32 | 0.6162 | 0.7600 | 0.4193 | 0.033* | |
H35A | 0.5208 | 0.6739 | 0.3362 | 0.052* | |
H35B | 0.4342 | 0.6992 | 0.3714 | 0.052* | |
H35C | 0.5230 | 0.6985 | 0.4288 | 0.052* | |
H53 | 0.6700 | 0.7121 | 0.1658 | 0.033* | |
H54 | 0.7849 | 0.7212 | 0.2671 | 0.040* | |
H55 | 0.8256 | 0.6604 | 0.3550 | 0.035* | |
H56 | 0.7522 | 0.5924 | 0.3398 | 0.029* | |
H63 | 0.5624 | 0.6986 | 0.0745 | 0.033* | |
H64 | 0.4503 | 0.6769 | −0.0237 | 0.039* | |
H65 | 0.3977 | 0.6029 | −0.0211 | 0.038* | |
H66 | 0.4531 | 0.5534 | 0.0827 | 0.035* | |
H72 | 0.3216 | 0.5237 | 0.3049 | 0.038* | |
H74A | 0.4082 | 0.6072 | 0.4376 | 0.052* | |
H74B | 0.3208 | 0.5786 | 0.4164 | 0.052* | |
H74C | 0.3444 | 0.6220 | 0.3594 | 0.052* | |
H75A | 0.3962 | 0.4528 | 0.1433 | 0.057* | |
H75B | 0.3138 | 0.4632 | 0.2060 | 0.057* | |
H75C | 0.3939 | 0.4322 | 0.2395 | 0.057* |
U11 | U22 | U33 | U12 | U13 | U23 | |
V1 | 0.0224 (3) | 0.0199 (3) | 0.0200 (3) | 0.0014 (2) | 0.0002 (2) | 0.00172 (19) |
N11 | 0.0211 (12) | 0.0218 (12) | 0.0161 (11) | 0.0008 (10) | −0.0016 (10) | 0.0020 (9) |
C12 | 0.0235 (15) | 0.0193 (14) | 0.0184 (13) | −0.0024 (11) | −0.0050 (12) | −0.0006 (11) |
C13 | 0.0322 (16) | 0.0208 (15) | 0.0237 (15) | 0.0011 (12) | −0.0021 (13) | −0.0012 (12) |
C14 | 0.0382 (18) | 0.0259 (16) | 0.0279 (16) | −0.0067 (14) | −0.0001 (14) | 0.0073 (13) |
C15 | 0.0294 (16) | 0.0313 (17) | 0.0198 (15) | −0.0046 (13) | 0.0016 (13) | 0.0037 (13) |
C16 | 0.0226 (15) | 0.0302 (16) | 0.0162 (13) | −0.0009 (12) | −0.0014 (12) | −0.0006 (12) |
N21 | 0.0210 (12) | 0.0197 (12) | 0.0169 (11) | −0.0011 (10) | −0.0034 (10) | 0.0021 (9) |
C22 | 0.0204 (14) | 0.0234 (14) | 0.0147 (13) | −0.0021 (11) | −0.0029 (11) | −0.0011 (11) |
C23 | 0.0266 (16) | 0.0216 (14) | 0.0277 (16) | 0.0000 (12) | −0.0006 (13) | −0.0024 (13) |
C24 | 0.0276 (16) | 0.0306 (16) | 0.0249 (16) | 0.0045 (13) | 0.0001 (13) | −0.0042 (13) |
C25 | 0.0235 (15) | 0.0351 (17) | 0.0217 (15) | −0.0001 (13) | −0.0005 (13) | 0.0013 (13) |
C26 | 0.0261 (16) | 0.0231 (15) | 0.0223 (15) | −0.0009 (12) | −0.0012 (13) | 0.0031 (12) |
O31 | 0.0266 (11) | 0.0271 (11) | 0.0239 (11) | −0.0023 (9) | −0.0072 (9) | 0.0054 (9) |
C31 | 0.0231 (15) | 0.0312 (16) | 0.0210 (15) | 0.0070 (13) | 0.0018 (12) | −0.0009 (13) |
C34 | 0.0297 (17) | 0.0344 (18) | 0.0268 (16) | −0.0023 (14) | −0.0041 (14) | 0.0001 (14) |
C32 | 0.0353 (18) | 0.0280 (16) | 0.0202 (15) | 0.0056 (13) | −0.0032 (14) | 0.0018 (13) |
C33 | 0.0320 (17) | 0.0226 (15) | 0.0232 (15) | 0.0108 (13) | 0.0048 (13) | 0.0011 (12) |
C35 | 0.051 (2) | 0.0262 (17) | 0.0278 (17) | 0.0015 (15) | 0.0032 (15) | 0.0049 (13) |
O33 | 0.0296 (11) | 0.0241 (11) | 0.0233 (11) | −0.0014 (9) | −0.0017 (9) | 0.0038 (9) |
N41 | 0.0304 (14) | 0.0234 (13) | 0.0219 (13) | 0.0001 (11) | −0.0024 (11) | −0.0016 (10) |
C42 | 0.0274 (16) | 0.0221 (15) | 0.0227 (15) | 0.0055 (12) | 0.0010 (13) | −0.0003 (12) |
S1 | 0.0279 (4) | 0.0372 (5) | 0.0279 (4) | 0.0009 (3) | −0.0042 (3) | −0.0093 (3) |
O1 | 0.0318 (12) | 0.0265 (11) | 0.0327 (12) | 0.0053 (9) | 0.0067 (10) | 0.0032 (9) |
V2 | 0.0191 (2) | 0.0204 (2) | 0.0204 (3) | −0.00065 (19) | −0.0007 (2) | 0.0013 (2) |
N51 | 0.0195 (12) | 0.0221 (12) | 0.0184 (11) | −0.0003 (9) | 0.0014 (10) | −0.0003 (10) |
C52 | 0.0220 (15) | 0.0205 (14) | 0.0203 (14) | 0.0023 (11) | 0.0047 (12) | 0.0013 (12) |
C53 | 0.0316 (17) | 0.0210 (15) | 0.0308 (17) | 0.0004 (13) | 0.0052 (14) | 0.0026 (13) |
C54 | 0.0341 (18) | 0.0247 (16) | 0.042 (2) | −0.0063 (14) | −0.0007 (15) | −0.0046 (14) |
C55 | 0.0287 (17) | 0.0313 (17) | 0.0279 (16) | −0.0043 (13) | −0.0048 (13) | −0.0017 (14) |
C56 | 0.0233 (15) | 0.0271 (16) | 0.0219 (15) | 0.0007 (12) | −0.0013 (12) | 0.0013 (13) |
N61 | 0.0207 (12) | 0.0239 (12) | 0.0209 (12) | −0.0001 (10) | −0.0037 (10) | −0.0004 (10) |
C62 | 0.0202 (14) | 0.0239 (15) | 0.0182 (14) | 0.0039 (11) | 0.0044 (11) | −0.0007 (11) |
C63 | 0.0315 (17) | 0.0272 (16) | 0.0240 (15) | 0.0058 (13) | 0.0041 (13) | 0.0034 (13) |
C64 | 0.0333 (18) | 0.0396 (19) | 0.0250 (16) | 0.0107 (15) | −0.0018 (14) | 0.0073 (14) |
C65 | 0.0310 (17) | 0.0380 (19) | 0.0268 (16) | 0.0039 (14) | −0.0087 (14) | 0.0012 (14) |
C66 | 0.0292 (16) | 0.0320 (17) | 0.0273 (16) | −0.0001 (14) | −0.0052 (14) | 0.0019 (14) |
C71 | 0.0238 (15) | 0.0329 (17) | 0.0265 (16) | 0.0034 (13) | 0.0029 (13) | 0.0098 (13) |
O71 | 0.0233 (11) | 0.0290 (11) | 0.0270 (11) | −0.0006 (9) | 0.0036 (9) | −0.0004 (9) |
C72 | 0.0193 (15) | 0.0358 (18) | 0.0393 (19) | −0.0048 (13) | −0.0001 (14) | 0.0084 (15) |
C74 | 0.0269 (17) | 0.0416 (19) | 0.0364 (19) | 0.0035 (14) | 0.0090 (15) | 0.0035 (15) |
C73 | 0.0244 (16) | 0.0293 (16) | 0.0285 (16) | −0.0030 (13) | −0.0057 (13) | 0.0094 (13) |
C75 | 0.0338 (19) | 0.0375 (19) | 0.042 (2) | −0.0121 (15) | −0.0069 (16) | 0.0055 (16) |
O73 | 0.0239 (11) | 0.0277 (11) | 0.0286 (11) | −0.0060 (9) | 0.0000 (9) | −0.0002 (9) |
N81 | 0.0208 (13) | 0.0278 (13) | 0.0259 (13) | −0.0012 (10) | 0.0017 (11) | −0.0023 (11) |
C82 | 0.0221 (15) | 0.0259 (15) | 0.0294 (17) | 0.0037 (12) | −0.0049 (13) | 0.0013 (13) |
S2 | 0.0400 (5) | 0.0519 (6) | 0.0262 (4) | 0.0123 (4) | −0.0004 (4) | −0.0095 (4) |
O2 | 0.0320 (12) | 0.0227 (11) | 0.0265 (11) | −0.0026 (9) | −0.0047 (9) | 0.0033 (9) |
V1—O1 | 1.603 (2) | V2—O2 | 1.608 (2) |
V1—O31 | 2.000 (2) | V2—O71 | 1.998 (2) |
V1—O33 | 1.967 (2) | V2—O73 | 1.963 (2) |
V1—N11 | 2.133 (2) | V2—N51 | 2.142 (2) |
V1—N21 | 2.270 (2) | V2—N61 | 2.261 (2) |
V1—N41 | 2.044 (3) | V2—N81 | 2.032 (3) |
N11—C16 | 1.342 (4) | N51—C56 | 1.345 (4) |
N11—C12 | 1.351 (4) | N51—C52 | 1.364 (4) |
C12—C13 | 1.390 (4) | C52—C53 | 1.386 (4) |
C12—C22 | 1.487 (4) | C52—C62 | 1.479 (4) |
C13—C14 | 1.387 (4) | C53—C54 | 1.383 (5) |
C13—H13 | 0.95 | C53—H53 | 0.95 |
C14—C15 | 1.374 (4) | C54—C55 | 1.374 (4) |
C14—H14 | 0.95 | C54—H54 | 0.95 |
C15—C16 | 1.385 (4) | C55—C56 | 1.378 (4) |
C15—H15 | 0.95 | C55—H55 | 0.95 |
C16—H16 | 0.95 | C56—H56 | 0.95 |
N21—C26 | 1.334 (4) | N61—C66 | 1.338 (4) |
N21—C22 | 1.348 (4) | N61—C62 | 1.353 (4) |
C22—C23 | 1.387 (4) | C62—C63 | 1.384 (4) |
C23—C24 | 1.390 (4) | C63—C64 | 1.392 (4) |
C23—H23 | 0.95 | C63—H63 | 0.95 |
C24—C25 | 1.380 (4) | C64—C65 | 1.373 (5) |
C24—H24 | 0.95 | C64—H64 | 0.95 |
C25—C26 | 1.394 (4) | C65—C66 | 1.386 (4) |
C25—H25 | 0.95 | C65—H65 | 0.95 |
C26—H26 | 0.95 | C66—H66 | 0.95 |
O31—C31 | 1.277 (3) | C71—O71 | 1.279 (4) |
C31—C32 | 1.398 (4) | C71—C72 | 1.403 (4) |
C31—C34 | 1.499 (4) | C71—C74 | 1.506 (4) |
C34—H34A | 0.98 | C72—C73 | 1.382 (5) |
C34—H34B | 0.98 | C72—H72 | 0.95 |
C34—H34C | 0.98 | C74—H74A | 0.98 |
C32—C33 | 1.376 (4) | C74—H74B | 0.98 |
C32—H32 | 0.95 | C74—H74C | 0.98 |
C33—O33 | 1.294 (3) | C73—O73 | 1.285 (4) |
C33—C35 | 1.498 (4) | C73—C75 | 1.500 (4) |
C35—H35A | 0.98 | C75—H75A | 0.98 |
C35—H35B | 0.98 | C75—H75B | 0.98 |
C35—H35C | 0.98 | C75—H75C | 0.98 |
N41—C42 | 1.164 (4) | N81—C82 | 1.161 (4) |
C42—S1 | 1.633 (3) | C82—S2 | 1.626 (3) |
O1—V1—O33 | 105.15 (10) | O2—V2—O73 | 104.07 (10) |
O1—V1—O31 | 98.38 (10) | O2—V2—O71 | 98.64 (10) |
O33—V1—O31 | 88.63 (8) | O73—V2—O71 | 88.64 (9) |
O1—V1—N41 | 97.51 (11) | O2—V2—N81 | 99.04 (11) |
O33—V1—N41 | 88.30 (9) | O73—V2—N81 | 85.35 (9) |
O31—V1—N41 | 164.07 (9) | O71—V2—N81 | 162.23 (10) |
O1—V1—N11 | 92.76 (10) | O2—V2—N51 | 92.93 (10) |
O33—V1—N11 | 161.60 (9) | O73—V2—N51 | 162.92 (9) |
O31—V1—N11 | 84.55 (8) | O71—V2—N51 | 87.28 (9) |
N41—V1—N11 | 93.59 (9) | N81—V2—N51 | 93.58 (9) |
O1—V1—N21 | 165.68 (10) | O2—V2—N61 | 165.92 (10) |
O33—V1—N21 | 89.16 (8) | O73—V2—N61 | 90.00 (9) |
O31—V1—N21 | 81.06 (8) | O71—V2—N61 | 82.02 (9) |
N41—V1—N21 | 83.27 (9) | N81—V2—N61 | 81.27 (9) |
N11—V1—N21 | 72.92 (8) | N51—V2—N61 | 73.02 (9) |
C16—N11—C12 | 119.1 (2) | C56—N51—C52 | 118.2 (2) |
C16—N11—V1 | 119.94 (19) | C56—N51—V2 | 121.49 (19) |
C12—N11—V1 | 120.55 (18) | C52—N51—V2 | 120.17 (18) |
N11—C12—C13 | 121.2 (3) | N51—C52—C53 | 121.3 (3) |
N11—C12—C22 | 115.2 (2) | N51—C52—C62 | 115.2 (2) |
C13—C12—C22 | 123.5 (3) | C53—C52—C62 | 123.6 (3) |
C14—C13—C12 | 119.1 (3) | C54—C53—C52 | 119.4 (3) |
C14—C13—H13 | 120.4 | C54—C53—H53 | 120.3 |
C12—C13—H13 | 120.4 | C52—C53—H53 | 120.3 |
C15—C14—C13 | 119.3 (3) | C55—C54—C53 | 119.3 (3) |
C15—C14—H14 | 120.3 | C55—C54—H54 | 120.3 |
C13—C14—H14 | 120.3 | C53—C54—H54 | 120.3 |
C14—C15—C16 | 119.0 (3) | C54—C55—C56 | 119.0 (3) |
C14—C15—H15 | 120.5 | C54—C55—H55 | 120.5 |
C16—C15—H15 | 120.5 | C56—C55—H55 | 120.5 |
N11—C16—C15 | 122.1 (3) | N51—C56—C55 | 122.8 (3) |
N11—C16—H16 | 118.9 | N51—C56—H56 | 118.6 |
C15—C16—H16 | 118.9 | C55—C56—H56 | 118.6 |
C26—N21—C22 | 118.6 (2) | C66—N61—C62 | 118.3 (3) |
C26—N21—V1 | 124.86 (19) | C66—N61—V2 | 124.9 (2) |
C22—N21—V1 | 116.32 (18) | C62—N61—V2 | 116.80 (18) |
N21—C22—C23 | 122.0 (3) | N61—C62—C63 | 121.8 (3) |
N21—C22—C12 | 114.4 (2) | N61—C62—C52 | 114.5 (2) |
C23—C22—C12 | 123.6 (3) | C63—C62—C52 | 123.6 (3) |
C22—C23—C24 | 118.9 (3) | C62—C63—C64 | 118.9 (3) |
C22—C23—H23 | 120.6 | C62—C63—H63 | 120.6 |
C24—C23—H23 | 120.6 | C64—C63—H63 | 120.6 |
C25—C24—C23 | 119.4 (3) | C65—C64—C63 | 119.4 (3) |
C25—C24—H24 | 120.3 | C65—C64—H64 | 120.3 |
C23—C24—H24 | 120.3 | C63—C64—H64 | 120.3 |
C24—C25—C26 | 118.1 (3) | C64—C65—C66 | 118.5 (3) |
C24—C25—H25 | 120.9 | C64—C65—H65 | 120.7 |
C26—C25—H25 | 120.9 | C66—C65—H65 | 120.7 |
N21—C26—C25 | 123.0 (3) | N61—C66—C65 | 123.0 (3) |
N21—C26—H26 | 118.5 | N61—C66—H66 | 118.5 |
C25—C26—H26 | 118.5 | C65—C66—H66 | 118.5 |
C31—O31—V1 | 128.1 (2) | O71—C71—C72 | 124.3 (3) |
O31—C31—C32 | 124.0 (3) | O71—C71—C74 | 115.9 (3) |
O31—C31—C34 | 115.8 (3) | C72—C71—C74 | 119.8 (3) |
C32—C31—C34 | 120.3 (3) | C71—O71—V2 | 128.2 (2) |
C31—C34—H34A | 109.5 | C73—C72—C71 | 125.0 (3) |
C31—C34—H34B | 109.5 | C73—C72—H72 | 117.5 |
H34A—C34—H34B | 109.5 | C71—C72—H72 | 117.5 |
C31—C34—H34C | 109.5 | C71—C74—H74A | 109.5 |
H34A—C34—H34C | 109.5 | C71—C74—H74B | 109.5 |
H34B—C34—H34C | 109.5 | H74A—C74—H74B | 109.5 |
C33—C32—C31 | 124.9 (3) | C71—C74—H74C | 109.5 |
C33—C32—H32 | 117.5 | H74A—C74—H74C | 109.5 |
C31—C32—H32 | 117.5 | H74B—C74—H74C | 109.5 |
O33—C33—C32 | 124.9 (3) | O73—C73—C72 | 124.1 (3) |
O33—C33—C35 | 114.2 (3) | O73—C73—C75 | 115.0 (3) |
C32—C33—C35 | 120.9 (3) | C72—C73—C75 | 121.0 (3) |
C33—C35—H35A | 109.5 | C73—C75—H75A | 109.5 |
C33—C35—H35B | 109.5 | C73—C75—H75B | 109.5 |
H35A—C35—H35B | 109.5 | H75A—C75—H75B | 109.5 |
C33—C35—H35C | 109.5 | C73—C75—H75C | 109.5 |
H35A—C35—H35C | 109.5 | H75A—C75—H75C | 109.5 |
H35B—C35—H35C | 109.5 | H75B—C75—H75C | 109.5 |
C33—O33—V1 | 127.98 (19) | C73—O73—V2 | 129.7 (2) |
V1—N41—C42 | 175.5 (2) | V2—N81—C82 | 168.1 (2) |
N41—C42—S1 | 179.4 (3) | N81—C82—S2 | 177.1 (3) |
O1—V1—N11—C16 | −1.2 (2) | N81—V2—N51—C56 | −99.0 (2) |
O33—V1—N11—C16 | 165.7 (3) | N61—V2—N51—C56 | −178.7 (2) |
O31—V1—N11—C16 | 97.0 (2) | O2—V2—N51—C52 | −175.8 (2) |
N41—V1—N11—C16 | −98.9 (2) | O73—V2—N51—C52 | −0.9 (4) |
N21—V1—N11—C16 | 179.3 (2) | O71—V2—N51—C52 | −77.3 (2) |
O1—V1—N11—C12 | −174.0 (2) | N81—V2—N51—C52 | 85.0 (2) |
O33—V1—N11—C12 | −7.1 (4) | N61—V2—N51—C52 | 5.23 (19) |
O31—V1—N11—C12 | −75.8 (2) | C56—N51—C52—C53 | −0.2 (4) |
N41—V1—N11—C12 | 88.3 (2) | V2—N51—C52—C53 | 176.0 (2) |
N21—V1—N11—C12 | 6.51 (19) | C56—N51—C52—C62 | 178.7 (2) |
C16—N11—C12—C13 | −0.6 (4) | V2—N51—C52—C62 | −5.1 (3) |
V1—N11—C12—C13 | 172.2 (2) | N51—C52—C53—C54 | −0.5 (4) |
C16—N11—C12—C22 | −178.6 (2) | C62—C52—C53—C54 | −179.3 (3) |
V1—N11—C12—C22 | −5.8 (3) | C52—C53—C54—C55 | 0.5 (5) |
N11—C12—C13—C14 | −1.4 (4) | C53—C54—C55—C56 | 0.1 (5) |
C22—C12—C13—C14 | 176.4 (3) | C52—N51—C56—C55 | 0.9 (4) |
C12—C13—C14—C15 | 2.4 (5) | V2—N51—C56—C55 | −175.2 (2) |
C13—C14—C15—C16 | −1.5 (5) | C54—C55—C56—N51 | −0.9 (5) |
C12—N11—C16—C15 | 1.6 (4) | O2—V2—N61—C66 | 171.3 (4) |
V1—N11—C16—C15 | −171.3 (2) | O73—V2—N61—C66 | −6.3 (2) |
C14—C15—C16—N11 | −0.5 (4) | O71—V2—N61—C66 | −95.0 (2) |
O1—V1—N21—C26 | 177.4 (4) | N81—V2—N61—C66 | 79.0 (2) |
O33—V1—N21—C26 | −5.0 (2) | N51—V2—N61—C66 | 175.5 (3) |
O31—V1—N21—C26 | −93.7 (2) | O2—V2—N61—C62 | −8.9 (5) |
N41—V1—N21—C26 | 83.4 (2) | O73—V2—N61—C62 | 173.5 (2) |
N11—V1—N21—C26 | 179.3 (2) | O71—V2—N61—C62 | 84.9 (2) |
O1—V1—N21—C22 | −8.4 (5) | N81—V2—N61—C62 | −101.2 (2) |
O33—V1—N21—C22 | 169.25 (19) | N51—V2—N61—C62 | −4.72 (19) |
O31—V1—N21—C22 | 80.50 (19) | C66—N61—C62—C63 | 2.4 (4) |
N41—V1—N21—C22 | −102.4 (2) | V2—N61—C62—C63 | −177.4 (2) |
N11—V1—N21—C22 | −6.50 (18) | C66—N61—C62—C52 | −176.5 (2) |
C26—N21—C22—C23 | 2.0 (4) | V2—N61—C62—C52 | 3.7 (3) |
V1—N21—C22—C23 | −172.5 (2) | N51—C52—C62—N61 | 0.6 (3) |
C26—N21—C22—C12 | −179.7 (2) | C53—C52—C62—N61 | 179.5 (3) |
V1—N21—C22—C12 | 5.7 (3) | N51—C52—C62—C63 | −178.2 (3) |
N11—C12—C22—N21 | −0.4 (3) | C53—C52—C62—C63 | 0.7 (4) |
C13—C12—C22—N21 | −178.3 (3) | N61—C62—C63—C64 | −1.6 (4) |
N11—C12—C22—C23 | 177.9 (3) | C52—C62—C63—C64 | 177.2 (3) |
C13—C12—C22—C23 | 0.0 (4) | C62—C63—C64—C65 | −0.4 (4) |
N21—C22—C23—C24 | −1.2 (4) | C63—C64—C65—C66 | 1.6 (5) |
C12—C22—C23—C24 | −179.4 (3) | C62—N61—C66—C65 | −1.2 (4) |
C22—C23—C24—C25 | −0.9 (4) | V2—N61—C66—C65 | 178.6 (2) |
C23—C24—C25—C26 | 2.0 (4) | C64—C65—C66—N61 | −0.8 (5) |
C22—N21—C26—C25 | −0.8 (4) | C72—C71—O71—V2 | −4.3 (4) |
V1—N21—C26—C25 | 173.3 (2) | C74—C71—O71—V2 | 176.3 (2) |
C24—C25—C26—N21 | −1.3 (4) | O2—V2—O71—C71 | −100.9 (3) |
O1—V1—O31—C31 | −93.1 (2) | O73—V2—O71—C71 | 3.1 (2) |
O33—V1—O31—C31 | 12.0 (2) | N81—V2—O71—C71 | 73.2 (4) |
N41—V1—O31—C31 | 90.9 (4) | N51—V2—O71—C71 | 166.5 (2) |
N11—V1—O31—C31 | 174.9 (2) | N61—V2—O71—C71 | 93.3 (2) |
N21—V1—O31—C31 | 101.4 (2) | O71—C71—C72—C73 | 3.5 (5) |
V1—O31—C31—C32 | −6.8 (4) | C74—C71—C72—C73 | −177.2 (3) |
V1—O31—C31—C34 | 172.87 (19) | C71—C72—C73—O73 | −2.2 (5) |
O31—C31—C32—C33 | −3.7 (5) | C71—C72—C73—C75 | 177.3 (3) |
C34—C31—C32—C33 | 176.7 (3) | C72—C73—O73—V2 | 1.8 (4) |
C31—C32—C33—O33 | 3.7 (5) | C75—C73—O73—V2 | −177.6 (2) |
C31—C32—C33—C35 | −175.6 (3) | O2—V2—O73—C73 | 96.7 (3) |
C32—C33—O33—V1 | 7.0 (4) | O71—V2—O73—C73 | −1.9 (3) |
C35—C33—O33—V1 | −173.7 (2) | N81—V2—O73—C73 | −165.1 (3) |
O1—V1—O33—C33 | 86.3 (2) | N51—V2—O73—C73 | −78.1 (4) |
O31—V1—O33—C33 | −12.0 (2) | N61—V2—O73—C73 | −83.9 (3) |
N41—V1—O33—C33 | −176.3 (2) | O2—V2—N81—C82 | 145.4 (12) |
N11—V1—O33—C33 | −80.1 (4) | O73—V2—N81—C82 | 41.9 (12) |
N21—V1—O33—C33 | −93.1 (2) | O71—V2—N81—C82 | −28.7 (14) |
O2—V2—N51—C56 | 0.3 (2) | N51—V2—N81—C82 | −121.0 (12) |
O73—V2—N51—C56 | 175.2 (3) | N61—V2—N81—C82 | −48.8 (12) |
O71—V2—N51—C56 | 98.8 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13···O2i | 0.95 | 2.55 | 3.500 (4) | 179 |
C23—H23···O2i | 0.95 | 2.52 | 3.468 (4) | 177 |
C53—H53···O1 | 0.95 | 2.40 | 3.323 (4) | 163 |
C63—H63···O1 | 0.95 | 2.52 | 3.441 (4) | 165 |
C72—H72···N81ii | 0.95 | 2.53 | 3.457 (4) | 166 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) x−1/2, y, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | [V(C5H7O2)(NCS)O(C10H8N2)] |
Mr | 380.32 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 120 |
a, b, c (Å) | 15.0522 (10), 29.721 (2), 15.3753 (10) |
V (Å3) | 6878.4 (8) |
Z | 16 |
Radiation type | Mo Kα |
µ (mm−1) | 0.72 |
Crystal size (mm) | 0.18 × 0.10 × 0.04 |
Data collection | |
Diffractometer | Nonius KappaCCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2003) |
Tmin, Tmax | 0.882, 0.972 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 40301, 7898, 5904 |
Rint | 0.064 |
(sin θ/λ)max (Å−1) | 0.651 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.135, 1.13 |
No. of reflections | 7898 |
No. of parameters | 437 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.77, −0.69 |
Computer programs: COLLECT (Nonius, 1999), DENZO (Otwinowski & Minor, 1997) and COLLECT, DENZO and COLLECT, OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997), OSCAIL and SHELXL97 (Sheldrick, 1997), PLATON (Spek, 2003), SHELXL97 and PRPKAPPA (Ferguson, 1999).
V1—O1 | 1.603 (2) | V2—O2 | 1.608 (2) |
V1—O31 | 2.000 (2) | V2—O71 | 1.998 (2) |
V1—O33 | 1.967 (2) | V2—O73 | 1.963 (2) |
V1—N11 | 2.133 (2) | V2—N51 | 2.142 (2) |
V1—N21 | 2.270 (2) | V2—N61 | 2.261 (2) |
V1—N41 | 2.044 (3) | V2—N81 | 2.032 (3) |
N41—C42 | 1.164 (4) | N81—C82 | 1.161 (4) |
C42—S1 | 1.633 (3) | C82—S2 | 1.626 (3) |
N11—V1—N21 | 72.92 (8) | N51—V2—N61 | 73.02 (9) |
V1—N41—C42 | 175.5 (2) | V2—N81—C82 | 168.1 (2) |
N41—C42—S1 | 179.4 (3) | N81—C82—S2 | 177.1 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13···O2i | 0.95 | 2.55 | 3.500 (4) | 179 |
C23—H23···O2i | 0.95 | 2.52 | 3.468 (4) | 177 |
C53—H53···O1 | 0.95 | 2.40 | 3.323 (4) | 163 |
C63—H63···O1 | 0.95 | 2.52 | 3.441 (4) | 165 |
C72—H72···N81ii | 0.95 | 2.53 | 3.457 (4) | 166 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) x−1/2, y, −z+1/2. |
Acknowledgements
X-ray data were collected at the EPSRC X-ray Crystallographic Service, University of Southampton, England; the authors thank the staff for all their help and advice.
References
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The reactions of tris(pentane-2,4-dionato)vanadium(III) with salts of 2,2'-bipyridine and 1,10-phenanthroline containing non-coordinating anions have been used to prepare six-coordinate mixed-ligand complexes of vanadium (Kavitha et al., 2006; Kavitha et al., 2006a). In an attempt to prepare seven-coordinate VIII complexes using salts containing coordinating anions, the reaction of tris(pentane-2,4-dionato)vanadium(III) with 2,2'-bipyridinium thiocyanate was carried out. This resulted in the formation of the title compound, (I), an oxidized six-coordinate mixed-ligand complex of vanadium(IV).
Compound (I) (Fig. 1) crystallizes with Z' = 2 in space group Pbca. The oxo and thiocyanate ligands adopt mutually cis sites in both of the independent molecules, so that these molecules are chiral although the compound is racemic. The centrosymmetric space group accommodates equal numbers of Λ and Δ enantiomers, and in the selected asymmetric unit both molecules have the Λ configuration.
Because of the chemical hardness of the vanadium(IV) centre, the thiocyanate ligand coordinates via the N atom rather than via the S atom. The interbond angles at V indicate some distortion from the ideal octahedral geometry and this may be dominated by the rather small bite angles (Table 1) characteristic of the bipyridyl ligands. The key bond distances and angles within the two independent molecules are very similar; in particular, both molecules contain VNCS fragments which are nearly linear.
The molecules of compound (I) are linked into complex sheets by a combination of four C—H···O hydrogen bonds and one C—H···N hydrogen bond (Table 2). The sheet formation is readily analysed in terms of two one-dimensional sub-structures, one involving all of the C—H···O hydrogen bonds and the other depending on just the single C—H···N hydrogen bond. Within the selected asymmetric unit, atoms C53 and C63 flanking the bay region of the bipyridyl ligand in the type 2 molecule (containing atom V2) both act as hydrogen-bond donors to atom O1 in the type 1 molecule (containing atom V1). In addition, atoms C13 and C23 flanking the bay region of the bipyridyl ligand in the type 1 molecule at (x, y, z) both act as hydrogen-bond donors to atom O2 in the type 2 molecule at (1 − x, 1/2 + y, 1/2 − z), so forming a complex chain of alternating chelate and hydrogen-bonded rings running parallel to the [010] direction and generated by the 21 screw axis along (1/2, y, 1/4) (Fig. 2). Four chains of this type, each of which includes both type 1 and type 2 molecules, run through each unit cell. The chains generated by the screw axes along (0, y, 1/4) and (1/2, y, 1/4) include only the Λ enantiomers, while those along (0, y, 3/4) and (1/2, y, 3/4) include only the Δ enantiomers. We may note here the contrast between the hydrogen-bonding behaviour of compound (I), where each of the independent oxo ligands acts as a double acceptor of C—H···O hydrogen bonds, and that of the analogous compound (II) (see scheme), where the oxo ligand plays no part in the hydrogen bonding (Kavitha et al., 2006b).
The second sub-structure includes only the type 2 molecules, but both enantiomers of this molecule are present in each chain. Atom C72 of the pentanedionate ligand in the type 2 molecule at (x, y, z) acts as hydrogen-bond donor to thiocyanate atom N81 in the type 2 molecule at (−1/2 + x, y, 1/2 − z), so forming a simple C(6) (Bernstein et al., 1995) chain of alternating Λ and Δ enantiomers running parallel to the [100] direction and generated by the a-glide plane at z = 1/4 (Fig. 3).
The combination of these [100] and [010] chains generates a complex (001) sheet. Two such sheets, related to one another by inversion and lying in the domains 0 < z < 1/2 and 1/2 < z < 1, respectively, pass through each unit cell, but there are no direction-specific interactions between adjacent sheets. In particular, C—H···π(arene) hydrogen bonds and π–π stacking interactions are both absent from the structure of (I).