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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Molecular and supramolecular structures of 1-phenyl-4-phenylacetyl-2-thiosemicarbazide (H2L) and its complexes with diphenyllead(IV) chloride and acetate
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Molecular and supramolecular structures of 1-phenyl-4-phenylacetyl-2-thiosemicarbazide (H2L) and its complexes with diphenyllead(IV) chloride and acetate

机译：1-苯基-4-苯基乙酰基-2-硫代氨基脲（H2L）及其与氯化二苯基铅（IV）的配合物的分子和超分子结构

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Reaction of 1-phenyl-4-phenylacetyl-2-thiosemicarbazide (H2L) with diphenyllead(IV) dichloride and acetate afforded the complexes [PbPh2C](2)(H2L)(2)] and [PbPh2L]. The ligand and the complexes were characterized by elemental analyses, H-1 and C-13 NMR spectroscopy and X-ray crystallography. In the asymmetric unit of crystals of the ligand there are four independent molecules of H2L and four molecules of water, which associate in the lattice as two independent sheets. The complex [PbPh2Cl2(H2L)(2)](.)4MeOH has slightly distorted all-trans octahedral geometry around the lead atom, and the fact that the ligand is S-bound rather than O-bound suggests that PbPh2Cl2 behaves as a "soft" Lewis acid. Hydrogen bonds involving NH groups, Cl atoms and MeOH molecules yform a three-dimensional supramolecular structure. In [PbPh2L](Me2CO)-Me-., the L2- anion bridges between two metal centres, binding to one strongly via the N and S atoms and weakly via the 0 atom, and to the other via the 0 atom, thus creating polymeric chains along the b axis. The double deprotonation and metallation of H2L induce significant changes in its configuration and lengthen the C-S and C-O bonds, suggesting an evolution of the dianion towards a thiol-enol form.
机译：1-苯基-4-苯基乙酰基-2-硫代氨基脲（H2L）与二苯基铅（IV）二氯化物和乙酸盐的反应得到配合物[PbPh2C]（2）（H2L）（2）]和[PbPh2L]。配体和配合物通过元素分析，H-1和C-13 NMR光谱以及X射线晶体学进行表征。在配体晶体的不对称单元中，有四个独立的H2L分子和四个水分子，它们在晶格中缔结为两个独立的薄片。复杂的[PbPh2Cl2（H2L）（2）]（。）4MeOH略微扭曲了铅原子周围的全反八面体几何形状，而且配体是S结合而不是O结合的事实表明，PbPh2Cl2的行为类似于“软”路易斯酸。涉及NH基团，Cl原子和MeOH分子的氢键形成三维超分子结构。在[PbPh2L]（Me2CO）-Me-。中，L2-阴离子在两个金属中心之间架桥，通过N和S原子牢固地键合，通过0原子弱键合，而通过0原子键合到另一个，从而产生沿b轴的聚合物链。 H2L的双重去质子化和金属化作用引起其构型的显着变化，并延长了C-S和C-O键，表明二价阴离子向硫醇-烯醇形式的演变。

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