metal-organic compounds
catena-Poly[(μ3-2-hydroxy-4-isopropylcyclohepta-2,4,6-trien-1-onato)(μ2-2-hydroxy-4-isopropylcyclohepta-2,4,6-trien-1-onato)lead(II)]
aInstitute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland
*Correspondence e-mail: k.lyczko@ichtj.waw.pl
In the title compound, [Pb(C10H11O2)2]n or [Pb(hino)2]n, the lead(II) ion is chelated by two hinokitiolate ligands in a distorted square-pyramidal configuration, with Pb—O bond lengths in the range 2.327 (6)–2.479 (9) Å. The 6s2 of the lead(II) ion becomes stereochemically active and is directed towards the apex of this pyramid. The of the title compound consists of chains formed by the bis(hinokitiolato)lead(II) molecules situated along the twofold screw axis. The coordination sphere around the lead(II) ion is completed by three additional O atoms, at 2.625 (7), 3.016 (8) and 3.064 (8) Å, from the two neighbouring Pb(hino)2 units. Both isopropyl groups are rotationally disordered.
Related literature
For structural data on hinokitiolato–metal complexes, see: Abrahams et al. (1994); Barret et al. (2000, 2001, 2002); Nomiya et al. (2004, 2009); Ho (2010). For related structures, see: Malik et al. (1999); Harrowfield et al. (2004); Lyczko et al. (2006, 2007). For hemi- and holodirected geometries of lead(II) complexes, see: Shimoni-Livny et al. (1998). For the van der Waals radii of lead and oxygen, see: Bondi (1964).
Experimental
Crystal data
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Data collection
Refinement
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Data collection: KM-4 Software (Kuma, 1996); cell KM-4 Software; data reduction: DATAPROC (Kuma, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810039978/bt5353sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810039978/bt5353Isup2.hkl
Lead(II) acetate trihydrate (0.188 g, 0.496 mmol) was dissolved in water (1.5 ml). A methanol solution (1.0 ml) of hinokitiol (0.171 g, 1.041 mmol) was added to the aqueous solution and the precipitation of the title compound took place. The bis(hinokitiolato)lead(II) compound was filtrated off and washed with methanol and acetone. By slow diffusion of n-hexane into a dichloromethane solution of the studied complex dark yellow crystals were obtained. Elemental analysis calculated for C20H22O4Pb: C 45.02, H 4.16%; found: C 44.86, H 4.15%. IR (KBr): 3035 (vw), 2959 (m), 2928 (vw), 2867 (vw), 1587 (s), 1497 (s), 1449 (w), 1442 (versus), 1383 (vw), 1364 (s), 296 (vw), 1239 (m), 1187 (vw), 960 (w), 924 (vw), 910 (vw), 883 (vw), 805 (w), 773 (vw), 756 (vw), 734 (w), 667 (vw), 641 (vw), 523 (vw), 494 (w), 416 (vw) cm-1.
H atoms were placed in calculated positions with C—H = 0.96 (methyl), 0.98 (methine) or 0.93 Å (aromatic) and were refined isotropic using a riding model with Uiso(H) = 1.5 Ueq(C) for methyl H atoms and Uiso(H) = 1.2 Ueq(C) for the rest H atoms. The structure of studied complex fits very well to the collected data. However, the
could not be determined because Friedel pairs were not measured and in fact the obtained has no physical sense. The structure was treated with two independent rotational disorders originating from two different isopropyl groups. For the first C3H7 group two-site disorder model consisting of two sets of atoms: C9A, C10A and C9B, C10B with site occupancy factors of 0.69 (4) and 0.31 (4), respectively was refined. The similar model containing C19A, C20A and C19B, C20B atoms with sof of 0.60 (6) and 0.40 (6), respectively was found for the second C3H7 group. C8 and C18 are shared atoms for both components of the disorder in the respective isopropyl groups. Rigid bonds and equal ADPs restraints in the isopropyl parts were employed in the process.Hinokitiol (2-hydroxy-4-isopropyl-2,4,6-cycloheptatrien-1-one), also called β-thujaplicin, abbreviated as Hhino, is a derivative of tropolone (Htrop) with isopropyl group in the position 4 of the aromatic seven-membered carbon ring. The hinokitiolate (hino-) anion, like the tropolonate (trop-) anion, is a bidentate oxygen donor ligand, which forms five-membered ring upon complexation to metal ions.
The structural data on metal complexes with hinokitiol are limited to only several examples. There are a few structures of homoleptic hinokitiolato-metal complexes such as [Cu(hino)2] (two forms, cis and trans, have been structurally characterized; Barret et al., 2002), [Pd(hino)2], [Sb(hino)3], [Zr(hino)4] (Nomiya et al., 2009), [In(hino)3] (Abrahams et al., 1994) and [Al(hino)3] (Nomiya et al., 2004). Moreover, some dimeric species, e.g. [Ag(hino)]2, [M(hino)2(EtOH)]2 (M = Co, Zn, Ni, Mg) (Nomiya et al., 2004, 2009; Barret et al., 2001), [Mn(hino)2(MeOH)]2 and [Bi(hino)3(EtOH)]2 (Nomiya et al., 2009), and one trimeric [Cu(hino)2]3 (Ho, 2010) have been reported. A small number of hinokitiolato-metal complexes with mixed ligands, e.g., [SnX2(hino)2] (X = F, Cl) (Barret et al., 2000) and [MoO2(hino)2] (Nomiya et al., 2009) have been structurally characterized.
The aim of this work was to determine the structure of the homoleptic complex formed by the lead(II) cation and hinokitiolate anions.
The molecular structure of the title compound consists of the lead(II) ion chelated by two hino- ions (Fig. 1). The lead atom and four oxygen atoms form a distorted square pyramid with Pb—O bond lengths of 2.327 (6), 2.420 (7), 2.422 (7) and 2.479 (9) Å, mean 2.412 Å. The bite angles in the chelate are equal to 64.1 (2) and 67.3 (2)°.
The square pyramidal configuration around metal ion (hemidirected geometry; Shimoni-Livny et al., 1998), is an evidence for the presence of a stereochemically active 6s2 β-diketonato)lead(II) complexes (Malik et al., 1999; Harrowfield et al., 2004; Lyczko et al., 2006;).
of the lead(II) ion at the apex of this pyramid, like in bis(tropolonato)lead(II) (Lyczko et al., 2007) and bis(The
of the studied compound consists of chains parallel to the c axis, formed by the Pb(hino)2 molecules situated around the twofold screw axis. The coordination sphere of the lead(II) ion can be completed by three additional bridging oxygen atoms from the adjacent ligands of two neighbouring Pb(hino)2 molecules (Fig. 2). These three Pb···O contacts, one rather short, 2.625 (7), and two more distant, 3.016 (8) and 3.064 (8) Å, are much longer than the Pb—O bonds in the chelate, but shorter than the sum of van der Waals radii of lead and oxygen (3.44 Å; Bondi, 1964), which points out to weak interactions. The additional Pb···O distances in the Pb(hino)2 structure lead to a formal increase of the of the lead(II) ion from four to seven.A similar α- or β-diketonates discussed above.
with a bit longer additional Pb···O contacts at 3.013 (5), 3.159 (6) and 3.264 (6) Å was found for bis(acetylacetonato)lead(II), Pb(acac)2 (Lyczko et al., 2006). The crystal packing in the title compound significantly differs from that obtained for bis(tropolonato)lead(II) complex (Lyczko et al., 2007), in which the [Pb(trop)2]2 dimeric units can be observed. Nevertheless the main structural feature, which is the distorted square pyramid, looks very similar in all lead(II)For structural data on hinokitiolato–metal complexes, see: Abrahams et al. (1994); Barret et al. (2000, 2001, 2002); Nomiya et al. (2004, 2009); Ho (2010). For related structures, see: Malik et al. (1999); Harrowfield et al. (2004); Lyczko et al. (2006, 2007). For hemi- and holodirected geometries of lead(II) complexes, see: Shimoni-Livny et al. (1998). For the van der Waals radii of lead and oxygen, see: Bondi (1964).
Data collection: KM-4 Software (Kuma, 1996); cell
KM-4 Software (Kuma, 1996); data reduction: DATAPROC (Kuma, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).[Pb(C10H11O2)2] | F(000) = 1024 |
Mr = 533.57 | Dx = 1.720 Mg m−3 |
Orthorhombic, Pna21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2c -2n | Cell parameters from 25 reflections |
a = 33.780 (7) Å | θ = 6–15° |
b = 8.2802 (17) Å | µ = 8.21 mm−1 |
c = 7.3661 (15) Å | T = 293 K |
V = 2060.3 (7) Å3 | Plate, dark yellow |
Z = 4 | 0.35 × 0.05 × 0.03 mm |
Kuma KM-4 four-circle diffractometer | 1969 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.093 |
Graphite monochromator | θmax = 30.0°, θmin = 1.2° |
profile data from ω/2θ scan | h = 0→45 |
Absorption correction: analytical (CrysAlis RED; Oxford Diffraction, 2000) | k = −11→1 |
Tmin = 0.527, Tmax = 0.789 | l = 0→10 |
3452 measured reflections | 3 standard reflections every 200 reflections |
3063 independent reflections | intensity decay: 1.1% |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.032 | H-atom parameters constrained |
wR(F2) = 0.093 | w = 1/[σ2(Fo2) + (0.0528P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.001 |
3063 reflections | Δρmax = 1.38 e Å−3 |
216 parameters | Δρmin = −2.11 e Å−3 |
13 restraints | Absolute structure: 0 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.004 (18) |
[Pb(C10H11O2)2] | V = 2060.3 (7) Å3 |
Mr = 533.57 | Z = 4 |
Orthorhombic, Pna21 | Mo Kα radiation |
a = 33.780 (7) Å | µ = 8.21 mm−1 |
b = 8.2802 (17) Å | T = 293 K |
c = 7.3661 (15) Å | 0.35 × 0.05 × 0.03 mm |
Kuma KM-4 four-circle diffractometer | 1969 reflections with I > 2σ(I) |
Absorption correction: analytical (CrysAlis RED; Oxford Diffraction, 2000) | Rint = 0.093 |
Tmin = 0.527, Tmax = 0.789 | 3 standard reflections every 200 reflections |
3452 measured reflections | intensity decay: 1.1% |
3063 independent reflections |
R[F2 > 2σ(F2)] = 0.032 | H-atom parameters constrained |
wR(F2) = 0.093 | Δρmax = 1.38 e Å−3 |
S = 1.06 | Δρmin = −2.11 e Å−3 |
3063 reflections | Absolute structure: 0 Friedel pairs |
216 parameters | Absolute structure parameter: −0.004 (18) |
13 restraints |
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 | Occ. (<1) | |
Pb1 | 0.481976 (9) | 0.57161 (3) | 0.75652 (10) | 0.03247 (9) | |
O1 | 0.4460 (2) | 0.4808 (9) | 0.4911 (10) | 0.0418 (16) | |
O11 | 0.4841 (2) | 0.3176 (7) | 0.8915 (10) | 0.0380 (15) | |
O12 | 0.5278 (2) | 0.3903 (9) | 0.6075 (9) | 0.0383 (18) | |
C6 | 0.3480 (4) | 0.4735 (14) | 0.285 (2) | 0.051 (3) | |
H6 | 0.3422 | 0.4691 | 0.1621 | 0.061* | |
C7 | 0.3888 (4) | 0.4763 (13) | 0.3168 (15) | 0.047 (3) | |
H7 | 0.4050 | 0.4696 | 0.2149 | 0.056* | |
C1 | 0.4082 (4) | 0.4881 (11) | 0.4871 (13) | 0.037 (2) | |
C2 | 0.3877 (4) | 0.5141 (14) | 0.6634 (14) | 0.041 (3) | |
C12 | 0.5365 (3) | 0.2592 (10) | 0.6953 (14) | 0.029 (2) | |
C11 | 0.5116 (3) | 0.2171 (12) | 0.8453 (13) | 0.034 (2) | |
C3 | 0.3461 (3) | 0.5041 (16) | 0.6895 (17) | 0.050 (3) | |
H3 | 0.3393 | 0.5113 | 0.8116 | 0.060* | |
C5 | 0.3149 (4) | 0.4757 (16) | 0.388 (2) | 0.062 (4) | |
H5 | 0.2909 | 0.4695 | 0.3269 | 0.075* | |
C4 | 0.3133 (4) | 0.486 (2) | 0.581 (2) | 0.065 (4) | |
O2 | 0.4095 (3) | 0.5386 (11) | 0.7952 (9) | 0.054 (2) | |
C17 | 0.5161 (4) | 0.0757 (11) | 0.9515 (17) | 0.047 (3) | |
H27 | 0.4975 | 0.0639 | 1.0437 | 0.057* | |
C14 | 0.5868 (4) | 0.0264 (15) | 0.6776 (18) | 0.049 (3) | |
C13 | 0.5692 (3) | 0.1717 (12) | 0.6255 (14) | 0.038 (2) | |
H23 | 0.5812 | 0.2205 | 0.5260 | 0.045* | |
C15 | 0.5738 (4) | −0.0695 (14) | 0.819 (2) | 0.060 (4) | |
H25 | 0.5880 | −0.1648 | 0.8353 | 0.072* | |
C18 | 0.6213 (5) | −0.0337 (18) | 0.559 (2) | 0.082 (4) | |
H18 | 0.6343 | −0.1202 | 0.6275 | 0.099* | |
C16 | 0.5434 (5) | −0.0469 (13) | 0.941 (2) | 0.066 (4) | |
H26 | 0.5410 | −0.1266 | 1.0291 | 0.079* | |
C8 | 0.2724 (4) | 0.483 (2) | 0.668 (2) | 0.087 (4) | |
H8 | 0.2534 | 0.4871 | 0.5679 | 0.104* | |
C9A | 0.2598 (7) | 0.613 (3) | 0.800 (4) | 0.087 (4) | 0.69 (4) |
H9A | 0.2623 | 0.7168 | 0.7426 | 0.130* | 0.69 (4) |
H9B | 0.2764 | 0.6094 | 0.9055 | 0.130* | 0.69 (4) |
H9C | 0.2327 | 0.5959 | 0.8346 | 0.130* | 0.69 (4) |
C10A | 0.2694 (7) | 0.314 (2) | 0.747 (5) | 0.087 (4) | 0.69 (4) |
H10A | 0.2774 | 0.2367 | 0.6564 | 0.130* | 0.69 (4) |
H10B | 0.2425 | 0.2926 | 0.7818 | 0.130* | 0.69 (4) |
H10C | 0.2864 | 0.3050 | 0.8507 | 0.130* | 0.69 (4) |
C9B | 0.2709 (15) | 0.656 (4) | 0.742 (9) | 0.087 (4) | 0.31 (4) |
H9D | 0.2819 | 0.7287 | 0.6532 | 0.130* | 0.31 (4) |
H9E | 0.2861 | 0.6628 | 0.8518 | 0.130* | 0.31 (4) |
H9F | 0.2440 | 0.6857 | 0.7662 | 0.130* | 0.31 (4) |
C10B | 0.2558 (15) | 0.367 (6) | 0.810 (6) | 0.087 (4) | 0.31 (4) |
H10D | 0.2287 | 0.3943 | 0.8354 | 0.130* | 0.31 (4) |
H10E | 0.2711 | 0.3744 | 0.9193 | 0.130* | 0.31 (4) |
H10F | 0.2570 | 0.2583 | 0.7641 | 0.130* | 0.31 (4) |
C19A | 0.6081 (9) | −0.107 (5) | 0.383 (4) | 0.082 (4) | 0.60 (6) |
H19A | 0.5888 | −0.1893 | 0.4069 | 0.123* | 0.60 (6) |
H19B | 0.6305 | −0.1531 | 0.3222 | 0.123* | 0.60 (6) |
H19C | 0.5965 | −0.0245 | 0.3082 | 0.123* | 0.60 (6) |
C20A | 0.6523 (9) | 0.101 (3) | 0.534 (6) | 0.082 (4) | 0.60 (6) |
H20A | 0.6595 | 0.1435 | 0.6509 | 0.123* | 0.60 (6) |
H20B | 0.6414 | 0.1851 | 0.4605 | 0.123* | 0.60 (6) |
H20C | 0.6754 | 0.0568 | 0.4763 | 0.123* | 0.60 (6) |
C19B | 0.6116 (14) | −0.039 (8) | 0.356 (4) | 0.082 (4) | 0.40 (6) |
H19D | 0.5866 | −0.0922 | 0.3390 | 0.123* | 0.40 (6) |
H19E | 0.6319 | −0.0975 | 0.2934 | 0.123* | 0.40 (6) |
H19F | 0.6101 | 0.0689 | 0.3098 | 0.123* | 0.40 (6) |
C20B | 0.6584 (9) | 0.057 (6) | 0.603 (8) | 0.082 (4) | 0.40 (6) |
H20D | 0.6632 | 0.0523 | 0.7310 | 0.123* | 0.40 (6) |
H20E | 0.6555 | 0.1676 | 0.5660 | 0.123* | 0.40 (6) |
H20F | 0.6802 | 0.0093 | 0.5391 | 0.123* | 0.40 (6) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pb1 | 0.04021 (16) | 0.03651 (14) | 0.02070 (12) | 0.00435 (15) | −0.0009 (6) | 0.0007 (4) |
O1 | 0.044 (4) | 0.055 (4) | 0.026 (3) | 0.003 (4) | 0.001 (3) | −0.008 (3) |
O11 | 0.046 (4) | 0.035 (3) | 0.033 (3) | 0.003 (3) | 0.005 (3) | 0.008 (3) |
O12 | 0.058 (5) | 0.042 (4) | 0.016 (3) | 0.013 (3) | 0.004 (3) | 0.008 (3) |
C6 | 0.069 (7) | 0.072 (6) | 0.013 (9) | −0.003 (5) | −0.007 (5) | −0.001 (5) |
C7 | 0.069 (8) | 0.049 (5) | 0.023 (5) | −0.003 (5) | −0.007 (5) | −0.002 (4) |
C1 | 0.055 (6) | 0.030 (4) | 0.027 (5) | 0.003 (5) | −0.004 (5) | −0.001 (4) |
C2 | 0.052 (7) | 0.049 (6) | 0.021 (5) | 0.002 (5) | −0.007 (5) | 0.000 (4) |
C12 | 0.037 (6) | 0.019 (4) | 0.033 (4) | 0.001 (4) | 0.004 (4) | 0.003 (3) |
C11 | 0.052 (7) | 0.028 (4) | 0.022 (4) | −0.011 (4) | 0.001 (4) | −0.001 (4) |
C3 | 0.039 (6) | 0.076 (8) | 0.035 (5) | −0.005 (6) | 0.006 (5) | −0.009 (6) |
C5 | 0.054 (8) | 0.063 (8) | 0.070 (10) | −0.003 (6) | −0.030 (8) | 0.006 (7) |
C4 | 0.059 (9) | 0.079 (9) | 0.057 (9) | 0.006 (7) | −0.007 (7) | −0.012 (8) |
O2 | 0.049 (4) | 0.096 (6) | 0.017 (6) | −0.004 (4) | −0.001 (3) | −0.012 (4) |
C17 | 0.073 (8) | 0.037 (5) | 0.032 (5) | −0.010 (6) | −0.001 (5) | 0.005 (4) |
C14 | 0.060 (8) | 0.038 (6) | 0.050 (7) | 0.013 (6) | −0.009 (6) | −0.003 (5) |
C13 | 0.050 (6) | 0.040 (5) | 0.023 (4) | 0.005 (4) | 0.001 (4) | 0.006 (4) |
C15 | 0.069 (7) | 0.038 (5) | 0.072 (11) | 0.013 (6) | 0.004 (7) | 0.014 (6) |
C18 | 0.070 (7) | 0.078 (8) | 0.098 (10) | 0.019 (6) | 0.023 (7) | −0.003 (7) |
C16 | 0.115 (13) | 0.035 (6) | 0.047 (7) | 0.004 (6) | 0.018 (8) | 0.014 (5) |
C8 | 0.042 (6) | 0.142 (11) | 0.077 (10) | 0.005 (6) | 0.002 (6) | 0.005 (9) |
C9A | 0.042 (6) | 0.142 (11) | 0.077 (10) | 0.005 (6) | 0.002 (6) | 0.005 (9) |
C10A | 0.042 (6) | 0.142 (11) | 0.077 (10) | 0.005 (6) | 0.002 (6) | 0.005 (9) |
C9B | 0.042 (6) | 0.142 (11) | 0.077 (10) | 0.005 (6) | 0.002 (6) | 0.005 (9) |
C10B | 0.042 (6) | 0.142 (11) | 0.077 (10) | 0.005 (6) | 0.002 (6) | 0.005 (9) |
C19A | 0.070 (7) | 0.078 (8) | 0.098 (10) | 0.019 (6) | 0.023 (7) | −0.003 (7) |
C20A | 0.070 (7) | 0.078 (8) | 0.098 (10) | 0.019 (6) | 0.023 (7) | −0.003 (7) |
C19B | 0.070 (7) | 0.078 (8) | 0.098 (10) | 0.019 (6) | 0.023 (7) | −0.003 (7) |
C20B | 0.070 (7) | 0.078 (8) | 0.098 (10) | 0.019 (6) | 0.023 (7) | −0.003 (7) |
Pb1—O11 | 2.327 (6) | C18—C20B | 1.495 (18) |
Pb1—O12 | 2.420 (7) | C18—C19A | 1.496 (18) |
Pb1—O1 | 2.422 (7) | C18—C19B | 1.529 (19) |
Pb1—O2 | 2.479 (9) | C18—C20A | 1.539 (17) |
Pb1—O12i | 2.625 (7) | C18—H18 | 0.9800 |
Pb1—O1i | 3.016 (8) | C16—H26 | 0.9300 |
Pb1—O11ii | 3.064 (8) | C8—C9A | 1.509 (16) |
O1—C1 | 1.278 (14) | C8—C10A | 1.518 (17) |
O11—C11 | 1.293 (12) | C8—C10B | 1.526 (19) |
O12—C12 | 1.297 (11) | C8—C9B | 1.534 (19) |
O12—Pb1ii | 2.626 (7) | C8—H8 | 0.9800 |
C6—C5 | 1.35 (2) | C9A—H9A | 0.9600 |
C6—C7 | 1.398 (17) | C9A—H9B | 0.9600 |
C6—H6 | 0.9300 | C9A—H9C | 0.9600 |
C7—C1 | 1.419 (15) | C10A—H10A | 0.9600 |
C7—H7 | 0.9300 | C10A—H10B | 0.9600 |
C1—C2 | 1.488 (15) | C10A—H10C | 0.9600 |
C2—O2 | 1.237 (13) | C9B—H9D | 0.9600 |
C2—C3 | 1.419 (17) | C9B—H9E | 0.9600 |
C12—C13 | 1.418 (14) | C9B—H9F | 0.9600 |
C12—C11 | 1.432 (13) | C10B—H10D | 0.9600 |
C11—C17 | 1.416 (14) | C10B—H10E | 0.9600 |
C3—C4 | 1.372 (18) | C10B—H10F | 0.9600 |
C3—H3 | 0.9300 | C19A—H19A | 0.9600 |
C5—C4 | 1.43 (2) | C19A—H19B | 0.9600 |
C5—H5 | 0.9300 | C19A—H19C | 0.9600 |
C4—C8 | 1.52 (2) | C20A—H20A | 0.9600 |
C17—C16 | 1.375 (17) | C20A—H20B | 0.9600 |
C17—H27 | 0.9300 | C20A—H20C | 0.9600 |
C14—C15 | 1.384 (17) | C19B—H19D | 0.9600 |
C14—C13 | 1.396 (15) | C19B—H19E | 0.9600 |
C14—C18 | 1.538 (19) | C19B—H19F | 0.9600 |
C13—H23 | 0.9300 | C20B—H20D | 0.9600 |
C15—C16 | 1.37 (2) | C20B—H20E | 0.9600 |
C15—H25 | 0.9300 | C20B—H20F | 0.9600 |
O11—Pb1—O12 | 67.3 (2) | C14—C18—H18 | 106.5 |
O11—Pb1—O1 | 94.6 (3) | C20A—C18—H18 | 106.5 |
O12—Pb1—O1 | 76.2 (3) | C15—C16—C17 | 129.7 (12) |
O11—Pb1—O2 | 83.2 (3) | C15—C16—H26 | 115.1 |
O12—Pb1—O2 | 128.0 (3) | C17—C16—H26 | 115.1 |
O1—Pb1—O2 | 64.1 (2) | C9A—C8—C10A | 113.4 (15) |
O11—Pb1—O12i | 72.0 (2) | C9A—C8—C4 | 120.7 (16) |
O12—Pb1—O12i | 126.99 (19) | C10A—C8—C4 | 103.7 (15) |
O1—Pb1—O12i | 140.3 (3) | C9A—C8—C10B | 85 (2) |
O2—Pb1—O12i | 77.0 (2) | C4—C8—C10B | 129 (2) |
C1—O1—Pb1 | 120.3 (6) | C10A—C8—C9B | 137 (3) |
C11—O11—Pb1 | 119.4 (6) | C4—C8—C9B | 99 (2) |
C12—O12—Pb1 | 115.9 (6) | C10B—C8—C9B | 109.8 (18) |
C12—O12—Pb1ii | 128.3 (6) | C9A—C8—H8 | 106.0 |
Pb1—O12—Pb1ii | 107.0 (3) | C10A—C8—H8 | 106.0 |
C5—C6—C7 | 136.4 (13) | C4—C8—H8 | 106.0 |
C5—C6—H6 | 111.8 | C10B—C8—H8 | 107.3 |
C7—C6—H6 | 111.8 | C9B—C8—H8 | 102.3 |
C6—C7—C1 | 127.1 (12) | C8—C9A—H9A | 109.5 |
C6—C7—H7 | 116.5 | C8—C9A—H9B | 109.5 |
C1—C7—H7 | 116.5 | H9A—C9A—H9B | 109.5 |
O1—C1—C7 | 118.5 (10) | C8—C9A—H9C | 109.5 |
O1—C1—C2 | 117.0 (9) | H9A—C9A—H9C | 109.5 |
C7—C1—C2 | 124.5 (11) | H9B—C9A—H9C | 109.5 |
O2—C2—C3 | 119.6 (11) | C8—C10A—H10A | 109.5 |
O2—C2—C1 | 115.5 (10) | C8—C10A—H10B | 109.5 |
C3—C2—C1 | 124.9 (11) | H10A—C10A—H10B | 109.5 |
O12—C12—C13 | 115.0 (9) | C8—C10A—H10C | 109.5 |
O12—C12—C11 | 117.1 (9) | H10A—C10A—H10C | 109.5 |
C13—C12—C11 | 127.8 (9) | H10B—C10A—H10C | 109.5 |
O11—C11—C17 | 117.7 (9) | C8—C9B—H9D | 109.5 |
O11—C11—C12 | 117.9 (9) | C8—C9B—H9E | 109.5 |
C17—C11—C12 | 124.3 (10) | H9D—C9B—H9E | 109.5 |
C4—C3—C2 | 136.5 (12) | C8—C9B—H9F | 109.5 |
C4—C3—H3 | 111.7 | H9D—C9B—H9F | 109.5 |
C2—C3—H3 | 111.7 | H9E—C9B—H9F | 109.5 |
C6—C5—C4 | 126.2 (13) | C8—C10B—H10D | 109.5 |
C6—C5—H5 | 116.9 | C8—C10B—H10E | 109.5 |
C4—C5—H5 | 116.9 | H10D—C10B—H10E | 109.5 |
C3—C4—C5 | 123.7 (15) | C8—C10B—H10F | 109.5 |
C3—C4—C8 | 119.3 (14) | H10D—C10B—H10F | 109.5 |
C5—C4—C8 | 116.9 (14) | H10E—C10B—H10F | 109.5 |
C2—O2—Pb1 | 121.1 (7) | C18—C19A—H19A | 109.5 |
C16—C17—C11 | 130.6 (12) | C18—C19A—H19B | 109.5 |
C16—C17—H27 | 114.7 | H19A—C19A—H19B | 109.5 |
C11—C17—H27 | 114.7 | C18—C19A—H19C | 109.5 |
C15—C14—C13 | 124.5 (12) | H19A—C19A—H19C | 109.5 |
C15—C14—C18 | 118.9 (11) | H19B—C19A—H19C | 109.5 |
C13—C14—C18 | 116.5 (12) | C18—C20A—H20A | 109.5 |
C14—C13—C12 | 132.3 (10) | C18—C20A—H20B | 109.5 |
C14—C13—H23 | 113.8 | H20A—C20A—H20B | 109.5 |
C12—C13—H23 | 113.8 | C18—C20A—H20C | 109.5 |
C16—C15—C14 | 130.6 (11) | H20A—C20A—H20C | 109.5 |
C16—C15—H25 | 114.7 | H20B—C20A—H20C | 109.5 |
C14—C15—H25 | 114.7 | C18—C19B—H19D | 109.5 |
C20B—C18—C19A | 130 (2) | C18—C19B—H19E | 109.5 |
C20B—C18—C19B | 113.9 (17) | H19D—C19B—H19E | 109.5 |
C20B—C18—C14 | 110 (2) | C18—C19B—H19F | 109.5 |
C19A—C18—C14 | 113.4 (16) | H19D—C19B—H19F | 109.5 |
C19B—C18—C14 | 114 (2) | H19E—C19B—H19F | 109.5 |
C19A—C18—C20A | 113.1 (15) | C18—C20B—H20D | 109.5 |
C19B—C18—C20A | 93 (2) | C18—C20B—H20E | 109.5 |
C14—C18—C20A | 110.4 (15) | H20D—C20B—H20E | 109.5 |
C20B—C18—H18 | 83.2 | C18—C20B—H20F | 109.5 |
C19A—C18—H18 | 106.5 | H20D—C20B—H20F | 109.5 |
C19B—C18—H18 | 125.3 | H20E—C20B—H20F | 109.5 |
O11—Pb1—O1—C1 | 92.9 (8) | C7—C6—C5—C4 | 2 (3) |
O12—Pb1—O1—C1 | 158.1 (8) | C2—C3—C4—C5 | −1 (3) |
O2—Pb1—O1—C1 | 12.7 (7) | C2—C3—C4—C8 | −179.4 (16) |
O12i—Pb1—O1—C1 | 25.7 (10) | C6—C5—C4—C3 | 3 (3) |
O12—Pb1—O11—C11 | 11.0 (7) | C6—C5—C4—C8 | −178.6 (15) |
O1—Pb1—O11—C11 | 84.0 (7) | C3—C2—O2—Pb1 | −176.8 (9) |
O2—Pb1—O11—C11 | 147.2 (7) | C1—C2—O2—Pb1 | 6.5 (14) |
O12i—Pb1—O11—C11 | −134.3 (7) | O11—Pb1—O2—C2 | −108.3 (10) |
O11—Pb1—O12—C12 | −13.3 (7) | O12—Pb1—O2—C2 | −54.3 (10) |
O1—Pb1—O12—C12 | −114.3 (7) | O1—Pb1—O2—C2 | −9.8 (9) |
O2—Pb1—O12—C12 | −73.9 (8) | O12i—Pb1—O2—C2 | 178.6 (10) |
O12i—Pb1—O12—C12 | 29.5 (7) | O11—C11—C17—C16 | −176.5 (13) |
O11—Pb1—O12—Pb1ii | 137.0 (4) | C12—C11—C17—C16 | 0.7 (19) |
O1—Pb1—O12—Pb1ii | 36.0 (3) | C15—C14—C13—C12 | 1 (2) |
O2—Pb1—O12—Pb1ii | 76.4 (4) | C18—C14—C13—C12 | 177.0 (12) |
O12i—Pb1—O12—Pb1ii | 179.8 (3) | O12—C12—C13—C14 | −178.3 (12) |
C5—C6—C7—C1 | −2 (2) | C11—C12—C13—C14 | −1 (2) |
Pb1—O1—C1—C7 | 163.2 (7) | C13—C14—C15—C16 | −2 (2) |
Pb1—O1—C1—C2 | −14.9 (12) | C18—C14—C15—C16 | −178.0 (16) |
C6—C7—C1—O1 | 176.5 (11) | C15—C14—C18—C20B | −106 (3) |
C6—C7—C1—C2 | −5.5 (19) | C13—C14—C18—C20B | 78 (3) |
O1—C1—C2—O2 | 5.4 (16) | C15—C14—C18—C19A | 100 (2) |
C7—C1—C2—O2 | −172.6 (11) | C13—C14—C18—C19A | −76 (2) |
O1—C1—C2—C3 | −171.2 (11) | C15—C14—C18—C19B | 125 (3) |
C7—C1—C2—C3 | 10.9 (18) | C13—C14—C18—C19B | −51 (3) |
Pb1—O12—C12—C13 | −167.3 (7) | C15—C14—C18—C20A | −132 (2) |
Pb1ii—O12—C12—C13 | 49.7 (13) | C13—C14—C18—C20A | 52 (3) |
Pb1—O12—C12—C11 | 14.6 (11) | C14—C15—C16—C17 | 3 (3) |
Pb1ii—O12—C12—C11 | −128.3 (8) | C11—C17—C16—C15 | −2 (3) |
Pb1—O11—C11—C17 | 169.3 (7) | C3—C4—C8—C9A | 51 (2) |
Pb1—O11—C11—C12 | −8.1 (11) | C5—C4—C8—C9A | −127 (2) |
O12—C12—C11—O11 | −5.0 (13) | C3—C4—C8—C10A | −77 (2) |
C13—C12—C11—O11 | 177.3 (10) | C5—C4—C8—C10A | 104 (2) |
O12—C12—C11—C17 | 177.9 (10) | C3—C4—C8—C10B | −59 (4) |
C13—C12—C11—C17 | 0.1 (16) | C5—C4—C8—C10B | 122 (3) |
O2—C2—C3—C4 | 176.4 (17) | C3—C4—C8—C9B | 66 (3) |
C1—C2—C3—C4 | −7 (3) | C5—C4—C8—C9B | −113 (3) |
Symmetry codes: (i) −x+1, −y+1, z+1/2; (ii) −x+1, −y+1, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Pb(C10H11O2)2] |
Mr | 533.57 |
Crystal system, space group | Orthorhombic, Pna21 |
Temperature (K) | 293 |
a, b, c (Å) | 33.780 (7), 8.2802 (17), 7.3661 (15) |
V (Å3) | 2060.3 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 8.21 |
Crystal size (mm) | 0.35 × 0.05 × 0.03 |
Data collection | |
Diffractometer | Kuma KM-4 four-circle |
Absorption correction | Analytical (CrysAlis RED; Oxford Diffraction, 2000) |
Tmin, Tmax | 0.527, 0.789 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3452, 3063, 1969 |
Rint | 0.093 |
(sin θ/λ)max (Å−1) | 0.703 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.093, 1.06 |
No. of reflections | 3063 |
No. of parameters | 216 |
No. of restraints | 13 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.38, −2.11 |
Absolute structure | 0 Friedel pairs |
Absolute structure parameter | −0.004 (18) |
Computer programs: KM-4 Software (Kuma, 1996), DATAPROC (Kuma, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008).
Pb1—O11 | 2.327 (6) | Pb1—O12i | 2.625 (7) |
Pb1—O12 | 2.420 (7) | Pb1—O1i | 3.016 (8) |
Pb1—O1 | 2.422 (7) | Pb1—O11ii | 3.064 (8) |
Pb1—O2 | 2.479 (9) | ||
O11—Pb1—O12 | 67.3 (2) | O1—Pb1—O2 | 64.1 (2) |
Symmetry codes: (i) −x+1, −y+1, z+1/2; (ii) −x+1, −y+1, z−1/2. |
Acknowledgements
The authors thank the Institute of
and Technology for financial support.References
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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.
Hinokitiol (2-hydroxy-4-isopropyl-2,4,6-cycloheptatrien-1-one), also called β-thujaplicin, abbreviated as Hhino, is a derivative of tropolone (Htrop) with isopropyl group in the position 4 of the aromatic seven-membered carbon ring. The hinokitiolate (hino-) anion, like the tropolonate (trop-) anion, is a bidentate oxygen donor ligand, which forms five-membered ring upon complexation to metal ions.
The structural data on metal complexes with hinokitiol are limited to only several examples. There are a few structures of homoleptic hinokitiolato-metal complexes such as [Cu(hino)2] (two forms, cis and trans, have been structurally characterized; Barret et al., 2002), [Pd(hino)2], [Sb(hino)3], [Zr(hino)4] (Nomiya et al., 2009), [In(hino)3] (Abrahams et al., 1994) and [Al(hino)3] (Nomiya et al., 2004). Moreover, some dimeric species, e.g. [Ag(hino)]2, [M(hino)2(EtOH)]2 (M = Co, Zn, Ni, Mg) (Nomiya et al., 2004, 2009; Barret et al., 2001), [Mn(hino)2(MeOH)]2 and [Bi(hino)3(EtOH)]2 (Nomiya et al., 2009), and one trimeric [Cu(hino)2]3 (Ho, 2010) have been reported. A small number of hinokitiolato-metal complexes with mixed ligands, e.g., [SnX2(hino)2] (X = F, Cl) (Barret et al., 2000) and [MoO2(hino)2] (Nomiya et al., 2009) have been structurally characterized.
The aim of this work was to determine the structure of the homoleptic complex formed by the lead(II) cation and hinokitiolate anions.
The molecular structure of the title compound consists of the lead(II) ion chelated by two hino- ions (Fig. 1). The lead atom and four oxygen atoms form a distorted square pyramid with Pb—O bond lengths of 2.327 (6), 2.420 (7), 2.422 (7) and 2.479 (9) Å, mean 2.412 Å. The bite angles in the chelate are equal to 64.1 (2) and 67.3 (2)°.
The square pyramidal configuration around metal ion (hemidirected geometry; Shimoni-Livny et al., 1998), is an evidence for the presence of a stereochemically active 6s2 lone electron pair of the lead(II) ion at the apex of this pyramid, like in bis(tropolonato)lead(II) (Lyczko et al., 2007) and bis(β-diketonato)lead(II) complexes (Malik et al., 1999; Harrowfield et al., 2004; Lyczko et al., 2006;).
The crystal structure of the studied compound consists of chains parallel to the c axis, formed by the Pb(hino)2 molecules situated around the twofold screw axis. The coordination sphere of the lead(II) ion can be completed by three additional bridging oxygen atoms from the adjacent ligands of two neighbouring Pb(hino)2 molecules (Fig. 2). These three Pb···O contacts, one rather short, 2.625 (7), and two more distant, 3.016 (8) and 3.064 (8) Å, are much longer than the Pb—O bonds in the chelate, but shorter than the sum of van der Waals radii of lead and oxygen (3.44 Å; Bondi, 1964), which points out to weak interactions. The additional Pb···O distances in the Pb(hino)2 structure lead to a formal increase of the coordination number of the lead(II) ion from four to seven.
A similar crystal structure with a bit longer additional Pb···O contacts at 3.013 (5), 3.159 (6) and 3.264 (6) Å was found for bis(acetylacetonato)lead(II), Pb(acac)2 (Lyczko et al., 2006). The crystal packing in the title compound significantly differs from that obtained for bis(tropolonato)lead(II) complex (Lyczko et al., 2007), in which the [Pb(trop)2]2 dimeric units can be observed. Nevertheless the main structural feature, which is the distorted square pyramid, looks very similar in all lead(II) α- or β-diketonates discussed above.