metal-organic compounds
Bis[N,N-dimethyl-1-(10H-pyrido[3,2-b][1,4]benzothiazin-10-yl)propan-2-aminium] tetrakis(thiocyanato-κN)cobaltate(II)
aDepartment of Physics, Yuvaraja's College (Constituent College), University of Mysore, Mysore 570 005, Karnataka, India, bGITAM Institute of Pharmacy, GITAM University, Visakhapatnam 530 045, Andhrapradesh, India, and cDepartment of Studies in Chemistry, Manasagangotri, University of Mysore, Mysore 570 006, Karnataka, India
*Correspondence e-mail: devarajegowda@yahoo.com
The 16H20N3S)2[Co(NCS)4], comprises one monovalent isothiopendylium cation and one-half of a divalent thiocyanatocobaltate(II) anion (2 symmetry). The central thiazine ring of the cation is slightly twisted in a boat-like fashion, with r.m.s. deviations from the mean plane of 0.272 (1) and 0.2852 (8) Å for the N and S atoms. The molecular structure of the cation is stabilized by an intramolecular N—H⋯N hydrogen bond. Within the complex anion, the CoII atom is tetrahedrally surrounded by four N atoms of the thiocyanate ligands. π–π stacking, with a distance of 3.7615 (10) Å between the centroids of benzene and pyridine rings, helps to consolidate the packing.
of the title salt, (CRelated literature
For general background to isothipendyl, cobalt(II) and thiocyanate compounds, see: Kinnamon et al. (1994); Moreau et al. (1995); Scott et al. (1990); Hudson et al. (2005). For a related structure, see: Shi et al. (2005).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536810021367/wm2356sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810021367/wm2356Isup2.hkl
The cobalt(II) salt was prepared by a single step method. Isothipendyl in ethanol (5 mmol) was slowly mixed with an ethanolic solution (5 mmol) of Co(SCN)2.2H2O. The mixture was kept at room temperature for 30 min and warmed on a water bath (343–353 K) for 1 h. Green crystals suitable for X-ray diffraction were obtained by slow evaporation of the solvent (M.P. 453 K; Yield 79%).
All H atoms were positioned at calculated positions with N—H = 0.91Å, C—H = 0.93 Å for aromatic H atoms, 0.97 Å for methylene H atoms and 0.96Å for methyl H atoms. H atoms were refined using a riding model with Uiso(H) = 1.5Ueq(C) for methyl H and Uiso(H) = 1.2Ueq(X) for other atoms (X = N, C).
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).(C16H20N3S)2[Co(NCS)4] | F(000) = 1796 |
Mr = 864.07 | Dx = 1.378 Mg m−3 |
Monoclinic, C2/c | Melting point: 453 K |
Hall symbol: -C 2yc | Mo Kα radiation, λ = 0.71073 Å |
a = 25.2420 (4) Å | Cell parameters from 6498 reflections |
b = 11.4357 (2) Å | θ = 1.6–30.8° |
c = 14.5939 (2) Å | µ = 0.75 mm−1 |
β = 98.557 (1)° | T = 295 K |
V = 4165.78 (11) Å3 | Plate, green |
Z = 4 | 0.22 × 0.15 × 0.12 mm |
Bruker APEXII CCD area-detector diffractometer | 6498 independent reflections |
Radiation source: fine-focus sealed tube | 4566 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.032 |
ω and ϕ scans | θmax = 30.8°, θmin = 1.6° |
Absorption correction: ψ scan (SADABS; Sheldrick, 2004) | h = −36→36 |
Tmin = 0.852, Tmax = 0.915 | k = −16→16 |
48347 measured reflections | l = −20→20 |
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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.114 | H-atom parameters constrained |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0516P)2 + 2.3179P] where P = (Fo2 + 2Fc2)/3 |
6498 reflections | (Δ/σ)max < 0.001 |
243 parameters | Δρmax = 0.30 e Å−3 |
0 restraints | Δρmin = −0.37 e Å−3 |
(C16H20N3S)2[Co(NCS)4] | V = 4165.78 (11) Å3 |
Mr = 864.07 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 25.2420 (4) Å | µ = 0.75 mm−1 |
b = 11.4357 (2) Å | T = 295 K |
c = 14.5939 (2) Å | 0.22 × 0.15 × 0.12 mm |
β = 98.557 (1)° |
Bruker APEXII CCD area-detector diffractometer | 6498 independent reflections |
Absorption correction: ψ scan (SADABS; Sheldrick, 2004) | 4566 reflections with I > 2σ(I) |
Tmin = 0.852, Tmax = 0.915 | Rint = 0.032 |
48347 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.114 | H-atom parameters constrained |
S = 1.01 | Δρmax = 0.30 e Å−3 |
6498 reflections | Δρmin = −0.37 e Å−3 |
243 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
Co1 | 0.0000 | 0.18800 (3) | 0.2500 | 0.05395 (11) | |
S1 | 0.169598 (17) | 0.36282 (5) | 0.31347 (4) | 0.06906 (15) | |
S2 | 0.09133 (3) | 0.39599 (6) | 0.04513 (5) | 0.0913 (2) | |
S3 | −0.09097 (2) | −0.11877 (5) | 0.08464 (4) | 0.06810 (15) | |
N1 | 0.30192 (5) | 0.17216 (12) | 0.37667 (10) | 0.0479 (3) | |
N2 | 0.29026 (5) | 0.36667 (11) | 0.33141 (9) | 0.0428 (3) | |
N3 | 0.40850 (5) | 0.23282 (13) | 0.40260 (9) | 0.0503 (3) | |
H3A | 0.3781 | 0.1888 | 0.3953 | 0.060* | |
N4 | 0.04020 (8) | 0.28147 (18) | 0.17318 (14) | 0.0771 (5) | |
N5 | −0.04823 (6) | 0.08326 (15) | 0.17017 (11) | 0.0595 (4) | |
C2 | 0.28169 (8) | 0.06803 (16) | 0.39813 (13) | 0.0589 (4) | |
H2 | 0.3049 | 0.0049 | 0.4101 | 0.071* | |
C3 | 0.22864 (9) | 0.05145 (18) | 0.40307 (14) | 0.0663 (5) | |
H3 | 0.2161 | −0.0205 | 0.4204 | 0.080* | |
C4 | 0.19412 (7) | 0.14419 (19) | 0.38174 (14) | 0.0621 (5) | |
H4 | 0.1578 | 0.1352 | 0.3848 | 0.074* | |
C5 | 0.21316 (6) | 0.24990 (16) | 0.35591 (11) | 0.0487 (4) | |
C6 | 0.26864 (5) | 0.26126 (14) | 0.35550 (10) | 0.0413 (3) | |
C7 | 0.21115 (6) | 0.48282 (17) | 0.34832 (11) | 0.0506 (4) | |
C8 | 0.18804 (8) | 0.5880 (2) | 0.36902 (13) | 0.0653 (5) | |
H8 | 0.1513 | 0.5917 | 0.3700 | 0.078* | |
C9 | 0.21887 (10) | 0.6863 (2) | 0.38804 (14) | 0.0729 (6) | |
H9 | 0.2030 | 0.7567 | 0.4007 | 0.087* | |
C10 | 0.27306 (10) | 0.68031 (18) | 0.38826 (14) | 0.0693 (5) | |
H10 | 0.2939 | 0.7472 | 0.4000 | 0.083* | |
C11 | 0.29708 (8) | 0.57504 (16) | 0.37113 (12) | 0.0562 (4) | |
H11 | 0.3341 | 0.5715 | 0.3736 | 0.067* | |
C12 | 0.26658 (6) | 0.47499 (14) | 0.35030 (10) | 0.0443 (3) | |
C13 | 0.34445 (6) | 0.36661 (15) | 0.30759 (10) | 0.0440 (3) | |
H13A | 0.3491 | 0.4375 | 0.2732 | 0.053* | |
H13B | 0.3476 | 0.3011 | 0.2666 | 0.053* | |
C14 | 0.39047 (6) | 0.35898 (15) | 0.38957 (11) | 0.0459 (3) | |
H14 | 0.3763 | 0.3831 | 0.4456 | 0.055* | |
C15 | 0.43718 (7) | 0.4390 (2) | 0.37864 (16) | 0.0689 (5) | |
H15A | 0.4659 | 0.4254 | 0.4285 | 0.103* | |
H15B | 0.4258 | 0.5190 | 0.3799 | 0.103* | |
H15C | 0.4494 | 0.4230 | 0.3206 | 0.103* | |
C16 | 0.43609 (9) | 0.2099 (2) | 0.49819 (14) | 0.0752 (6) | |
H16A | 0.4490 | 0.1308 | 0.5024 | 0.113* | |
H16B | 0.4114 | 0.2211 | 0.5414 | 0.113* | |
H16C | 0.4657 | 0.2628 | 0.5125 | 0.113* | |
C17 | 0.44122 (9) | 0.1896 (2) | 0.33280 (17) | 0.0764 (6) | |
H17A | 0.4771 | 0.2191 | 0.3474 | 0.115* | |
H17B | 0.4258 | 0.2162 | 0.2723 | 0.115* | |
H17C | 0.4419 | 0.1057 | 0.3337 | 0.115* | |
C18 | 0.06195 (8) | 0.32922 (17) | 0.12044 (15) | 0.0622 (5) | |
C19 | −0.06629 (6) | −0.00127 (16) | 0.13474 (12) | 0.0492 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co1 | 0.04465 (17) | 0.0540 (2) | 0.0604 (2) | 0.000 | −0.00135 (13) | 0.000 |
S1 | 0.03187 (19) | 0.0899 (4) | 0.0813 (3) | 0.0035 (2) | −0.00519 (19) | 0.0002 (3) |
S2 | 0.0961 (5) | 0.0837 (4) | 0.0981 (5) | −0.0315 (4) | 0.0272 (4) | 0.0016 (3) |
S3 | 0.0596 (3) | 0.0733 (3) | 0.0717 (3) | −0.0168 (2) | 0.0107 (2) | −0.0148 (2) |
N1 | 0.0407 (6) | 0.0498 (7) | 0.0536 (7) | −0.0035 (5) | 0.0078 (5) | 0.0019 (6) |
N2 | 0.0304 (5) | 0.0487 (7) | 0.0503 (7) | −0.0008 (5) | 0.0087 (5) | 0.0030 (6) |
N3 | 0.0354 (6) | 0.0617 (8) | 0.0528 (7) | 0.0017 (6) | 0.0038 (5) | −0.0058 (6) |
N4 | 0.0690 (11) | 0.0815 (12) | 0.0766 (11) | −0.0245 (9) | −0.0027 (9) | 0.0100 (10) |
N5 | 0.0439 (7) | 0.0615 (9) | 0.0701 (9) | −0.0001 (7) | −0.0014 (6) | −0.0029 (8) |
C2 | 0.0628 (10) | 0.0498 (9) | 0.0644 (10) | −0.0054 (8) | 0.0108 (8) | 0.0037 (8) |
C3 | 0.0728 (12) | 0.0586 (11) | 0.0709 (12) | −0.0233 (10) | 0.0218 (10) | −0.0009 (9) |
C4 | 0.0458 (8) | 0.0757 (12) | 0.0674 (11) | −0.0228 (9) | 0.0172 (8) | −0.0099 (10) |
C5 | 0.0332 (6) | 0.0644 (10) | 0.0484 (8) | −0.0073 (7) | 0.0055 (6) | −0.0045 (7) |
C6 | 0.0326 (6) | 0.0525 (8) | 0.0389 (7) | −0.0047 (6) | 0.0054 (5) | −0.0021 (6) |
C7 | 0.0433 (7) | 0.0657 (10) | 0.0418 (7) | 0.0115 (7) | 0.0031 (6) | 0.0061 (7) |
C8 | 0.0597 (10) | 0.0838 (14) | 0.0521 (9) | 0.0296 (10) | 0.0071 (8) | 0.0072 (9) |
C9 | 0.0941 (16) | 0.0655 (13) | 0.0572 (11) | 0.0290 (12) | 0.0056 (10) | 0.0009 (9) |
C10 | 0.0937 (16) | 0.0514 (10) | 0.0614 (11) | 0.0053 (10) | 0.0066 (10) | 0.0023 (9) |
C11 | 0.0585 (10) | 0.0530 (10) | 0.0565 (9) | −0.0007 (8) | 0.0066 (8) | 0.0047 (8) |
C12 | 0.0431 (7) | 0.0520 (9) | 0.0375 (7) | 0.0056 (6) | 0.0046 (5) | 0.0057 (6) |
C13 | 0.0340 (6) | 0.0550 (9) | 0.0448 (7) | −0.0025 (6) | 0.0115 (5) | 0.0029 (6) |
C14 | 0.0322 (6) | 0.0567 (9) | 0.0495 (8) | −0.0044 (6) | 0.0085 (6) | −0.0045 (7) |
C15 | 0.0421 (8) | 0.0783 (13) | 0.0871 (14) | −0.0189 (9) | 0.0116 (9) | −0.0023 (11) |
C16 | 0.0714 (13) | 0.0858 (15) | 0.0613 (11) | 0.0179 (11) | −0.0133 (10) | −0.0035 (10) |
C17 | 0.0584 (11) | 0.0925 (16) | 0.0811 (14) | 0.0187 (11) | 0.0194 (10) | −0.0162 (12) |
C18 | 0.0510 (9) | 0.0556 (10) | 0.0757 (12) | −0.0121 (8) | −0.0049 (9) | −0.0033 (9) |
C19 | 0.0310 (6) | 0.0614 (10) | 0.0546 (9) | 0.0033 (6) | 0.0048 (6) | 0.0030 (8) |
Co1—N4i | 1.9411 (19) | C5—C6 | 1.4073 (19) |
Co1—N4 | 1.9411 (19) | C7—C8 | 1.389 (3) |
Co1—N5 | 1.9626 (16) | C7—C12 | 1.398 (2) |
Co1—N5i | 1.9626 (16) | C8—C9 | 1.372 (3) |
S1—C5 | 1.7485 (18) | C8—H8 | 0.9300 |
S1—C7 | 1.756 (2) | C9—C10 | 1.369 (3) |
S2—C18 | 1.607 (2) | C9—H9 | 0.9300 |
S3—C19 | 1.6102 (19) | C10—C11 | 1.387 (3) |
N1—C6 | 1.328 (2) | C10—H10 | 0.9300 |
N1—C2 | 1.351 (2) | C11—C12 | 1.387 (2) |
N2—C6 | 1.390 (2) | C11—H11 | 0.9300 |
N2—C12 | 1.420 (2) | C13—C14 | 1.541 (2) |
N2—C13 | 1.4608 (18) | C13—H13A | 0.9700 |
N3—C16 | 1.487 (2) | C13—H13B | 0.9700 |
N3—C17 | 1.488 (2) | C14—C15 | 1.519 (2) |
N3—C14 | 1.516 (2) | C14—H14 | 0.9800 |
N3—H3A | 0.9100 | C15—H15A | 0.9600 |
N4—C18 | 1.148 (3) | C15—H15B | 0.9600 |
N5—C19 | 1.157 (2) | C15—H15C | 0.9600 |
C2—C3 | 1.365 (3) | C16—H16A | 0.9600 |
C2—H2 | 0.9300 | C16—H16B | 0.9600 |
C3—C4 | 1.378 (3) | C16—H16C | 0.9600 |
C3—H3 | 0.9300 | C17—H17A | 0.9600 |
C4—C5 | 1.374 (3) | C17—H17B | 0.9600 |
C4—H4 | 0.9300 | C17—H17C | 0.9600 |
N4i—Co1—N4 | 113.17 (13) | C8—C9—H9 | 120.1 |
N4i—Co1—N5 | 110.33 (8) | C9—C10—C11 | 120.4 (2) |
N4—Co1—N5 | 108.95 (7) | C9—C10—H10 | 119.8 |
N4i—Co1—N5i | 108.95 (7) | C11—C10—H10 | 119.8 |
N4—Co1—N5i | 110.33 (8) | C10—C11—C12 | 120.80 (19) |
N5—Co1—N5i | 104.78 (9) | C10—C11—H11 | 119.6 |
C5—S1—C7 | 99.06 (7) | C12—C11—H11 | 119.6 |
C6—N1—C2 | 118.85 (14) | C11—C12—C7 | 118.22 (16) |
C6—N2—C12 | 121.00 (12) | C11—C12—N2 | 121.74 (14) |
C6—N2—C13 | 118.47 (12) | C7—C12—N2 | 120.05 (15) |
C12—N2—C13 | 118.87 (13) | N2—C13—C14 | 116.08 (12) |
C16—N3—C17 | 110.70 (16) | N2—C13—H13A | 108.3 |
C16—N3—C14 | 112.07 (14) | C14—C13—H13A | 108.3 |
C17—N3—C14 | 114.63 (15) | N2—C13—H13B | 108.3 |
C16—N3—H3A | 106.3 | C14—C13—H13B | 108.3 |
C17—N3—H3A | 106.3 | H13A—C13—H13B | 107.4 |
C14—N3—H3A | 106.3 | N3—C14—C15 | 111.28 (14) |
C18—N4—Co1 | 172.97 (18) | N3—C14—C13 | 109.19 (13) |
C19—N5—Co1 | 160.60 (14) | C15—C14—C13 | 113.05 (14) |
N1—C2—C3 | 122.85 (19) | N3—C14—H14 | 107.7 |
N1—C2—H2 | 118.6 | C15—C14—H14 | 107.7 |
C3—C2—H2 | 118.6 | C13—C14—H14 | 107.7 |
C2—C3—C4 | 118.25 (18) | C14—C15—H15A | 109.5 |
C2—C3—H3 | 120.9 | C14—C15—H15B | 109.5 |
C4—C3—H3 | 120.9 | H15A—C15—H15B | 109.5 |
C5—C4—C3 | 120.25 (16) | C14—C15—H15C | 109.5 |
C5—C4—H4 | 119.9 | H15A—C15—H15C | 109.5 |
C3—C4—H4 | 119.9 | H15B—C15—H15C | 109.5 |
C4—C5—C6 | 118.11 (17) | N3—C16—H16A | 109.5 |
C4—C5—S1 | 121.32 (13) | N3—C16—H16B | 109.5 |
C6—C5—S1 | 120.26 (13) | H16A—C16—H16B | 109.5 |
N1—C6—N2 | 117.76 (12) | N3—C16—H16C | 109.5 |
N1—C6—C5 | 121.59 (15) | H16A—C16—H16C | 109.5 |
N2—C6—C5 | 120.64 (14) | H16B—C16—H16C | 109.5 |
C8—C7—C12 | 120.16 (18) | N3—C17—H17A | 109.5 |
C8—C7—S1 | 119.17 (14) | N3—C17—H17B | 109.5 |
C12—C7—S1 | 120.58 (13) | H17A—C17—H17B | 109.5 |
C9—C8—C7 | 120.63 (19) | N3—C17—H17C | 109.5 |
C9—C8—H8 | 119.7 | H17A—C17—H17C | 109.5 |
C7—C8—H8 | 119.7 | H17B—C17—H17C | 109.5 |
C10—C9—C8 | 119.72 (19) | N4—C18—S2 | 178.86 (19) |
C10—C9—H9 | 120.1 | N5—C19—S3 | 179.38 (17) |
N4i—Co1—N5—C19 | −126.5 (5) | S1—C7—C8—C9 | −173.88 (15) |
N4—Co1—N5—C19 | 108.7 (5) | C7—C8—C9—C10 | −1.2 (3) |
N5i—Co1—N5—C19 | −9.4 (4) | C8—C9—C10—C11 | −1.2 (3) |
C6—N1—C2—C3 | −3.0 (3) | C9—C10—C11—C12 | 2.3 (3) |
N1—C2—C3—C4 | 2.5 (3) | C10—C11—C12—C7 | −0.9 (3) |
C2—C3—C4—C5 | 0.3 (3) | C10—C11—C12—N2 | 179.22 (16) |
C3—C4—C5—C6 | −2.4 (3) | C8—C7—C12—C11 | −1.5 (2) |
C3—C4—C5—S1 | 171.23 (15) | S1—C7—C12—C11 | 174.88 (12) |
C7—S1—C5—C4 | 151.93 (15) | C8—C7—C12—N2 | 178.41 (14) |
C7—S1—C5—C6 | −34.59 (15) | S1—C7—C12—N2 | −5.2 (2) |
C2—N1—C6—N2 | −178.41 (15) | C6—N2—C12—C11 | 147.52 (15) |
C2—N1—C6—C5 | 0.7 (2) | C13—N2—C12—C11 | −17.5 (2) |
C12—N2—C6—N1 | −149.64 (14) | C6—N2—C12—C7 | −32.4 (2) |
C13—N2—C6—N1 | 15.5 (2) | C13—N2—C12—C7 | 162.56 (14) |
C12—N2—C6—C5 | 31.2 (2) | C6—N2—C13—C14 | −77.11 (18) |
C13—N2—C6—C5 | −163.65 (14) | C12—N2—C13—C14 | 88.31 (17) |
C4—C5—C6—N1 | 1.9 (2) | C16—N3—C14—C15 | 77.02 (19) |
S1—C5—C6—N1 | −171.75 (12) | C17—N3—C14—C15 | −50.2 (2) |
C4—C5—C6—N2 | −178.98 (15) | C16—N3—C14—C13 | −157.49 (15) |
S1—C5—C6—N2 | 7.3 (2) | C17—N3—C14—C13 | 75.24 (17) |
C5—S1—C7—C8 | −150.12 (14) | N2—C13—C14—N3 | 96.79 (16) |
C5—S1—C7—C12 | 33.45 (14) | N2—C13—C14—C15 | −138.75 (16) |
C12—C7—C8—C9 | 2.6 (3) |
Symmetry code: (i) −x, y, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | (C16H20N3S)2[Co(NCS)4] |
Mr | 864.07 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 295 |
a, b, c (Å) | 25.2420 (4), 11.4357 (2), 14.5939 (2) |
β (°) | 98.557 (1) |
V (Å3) | 4165.78 (11) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.75 |
Crystal size (mm) | 0.22 × 0.15 × 0.12 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | ψ scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.852, 0.915 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 48347, 6498, 4566 |
Rint | 0.032 |
(sin θ/λ)max (Å−1) | 0.720 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.114, 1.01 |
No. of reflections | 6498 |
No. of parameters | 243 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.30, −0.37 |
Computer programs: APEX2 (Bruker, 2008), SAINT (Bruker, 2008), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997).
Co1—N4 | 1.9411 (19) | Co1—N5 | 1.9626 (16) |
N4i—Co1—N4 | 113.17 (13) | N4—Co1—N5i | 110.33 (8) |
N4—Co1—N5 | 108.95 (7) | N5—Co1—N5i | 104.78 (9) |
Symmetry code: (i) −x, y, −z+1/2. |
Acknowledgements
The authors thank the DST India (FIST programme) for the use of the diffractometer at the School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India. They also thank Professor P. Thomas Muthiah for the data collection.
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The molecular structure of isothipendyl, C16H19N3S, is close to that of phenothiazines. Isothipendyl is an antihistamine used in the treatment of allergies. It was also found to be active against parasites causing filariasis (Kinnamon et al., 1994). Photobiological properties of isothipendyl were also investigated and found to have ultraviolet B (UVB) protective activity (Moreau et al., 1995). Studies also suggest that cobalt and thiocyanates play some role in phototoxicity and in the development of conjugates for photoimmunotherapy (Scott et al., 1990; Hudson et al., 2005). These outcomes arouse our interest and we prepared the title salt [(C16H20N3S)2{Co(NCS)4}], (I), for structural characterisation.
In the structure of (I), the Co atom of the anion is situated on a twofold rotation axis and is coordinated by four N atoms from four thiocyanate groups in a slightly distorted tetrahedral geometry (Fig. 1, Table 1). The bond lengths and bond angles of the cobaltate(II) anion are in good agreement with related structures (Shi et al., 2005).
Within the cation the dihedral angles between the benzene and the thiazine rings and between the pyridine and the thiazine rings are 15.73 (8)° and 14.77 (8)°, respectively. The central thiazine ring is slightly twisted as boat like. The deviation of the N and S atoms from the mean plane of the thiazine ring was found to be 0.272 (1) and 0.2852 (8) Å, respectively. The structure displays an intramolecular hydrogen bonding interaction between N3–H3A···N1 (Fig. 2 & Table 2).
There are significant π—π stacking interactions between the pyridine and benzene rings; the relevant distances are Cg2—Cg3i = 3.7615 (10) Å and Cg2—3iperp = 3.6975 (7) Å, and Cg3—Cg2ii = 3.7614 (10) Å and Cg3—2iiperp = 3.6820 (7) Å [symmetry codes: (i) 1/2 - x,1/2 + y,3/2 - z;(ii) 1/2 - x, -1/2 + y,3/2 - z; Cg2 and Cg3 are the centroids of the N1/C2–C6 and C7–C12 rings, respectively; CgI—Jperp is the perpendicular distance from CgI to ring J]. In addition, there are weak intermolecular C2—H2···S2 and C16—H16A···S2 interactions with H···S distances of 2.886 (10) and 2.919 (10) Å and D—H···A angles of 154.54 (12)° and 138.40 (14)°, respectively.
In the crystal structure, molecules stack along [010] (Fig. 3).