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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Cis/trans isomers of PtX2L2 (X = halogen, L = neutral ligand); the crystal structures of two polymorphs of cis-dichlorobis(dibenzyl sulfido-kappa S) platinum(II) in the temperature range 100-295 K
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Cis/trans isomers of PtX2L2 (X = halogen, L = neutral ligand); the crystal structures of two polymorphs of cis-dichlorobis(dibenzyl sulfido-kappa S) platinum(II) in the temperature range 100-295 K

机译:PtX2L2的顺/反异构体(X =卤素,L =中性配体);在100-295 K温度范围内的顺式-二氯双(二苄硫基-κS)铂(II)的两个多晶型物的晶体结构

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The structures of two polymorphs, one triclinic and one monoclinic, of cis-dichlorobis(dibenzyl sulfido-kappa S) platinum(II), cis-PtCl2(Bz(2)S)(2), have been determined at 295, 250, 200, 150 and 100 K. In both polymorphs the complex has a structure where platinum(II) coordinates two dibenzyl sulfide molecules and two chloro ligands, forming a complex with pseudo-square-planar coordination geometry. The triclinic polymorph shows disorder at all temperatures. Both polymorphs have a packing arrangement involving centrosymmetric structural dimers. cis-PtCl2(Bz(2)S)(2) belongs to a group of complexes with the general formula PtX2L2, where X is a halogen and L is a ligand with a donor atom from groups 14, 15 or 16. The distribution of structural classes among 173 cis-PtX2L2 compounds found in the Cambridge Structural Database (CSD, Version 5.28, November 2006) has been investigated. The predominant structural class [notation according to Belsky & Zorkii (1977). Acta Cryst. A33, 1004-1006] among the cis compounds is P2(1)/c, Z = 4 (1) (73 structures, 42%), followed by P (1) over bar, Z = 2 (1) (33 structures, 19%). Inversion centres combined with the screw-axis/glide plane are the dominating packing operators (56%) followed by the inversion centre (21%). The cis and trans influence in cis/trans-PtCl2L2 compounds has been investigated using data from the CSD. The cis influence is small for donor atoms in groups 15 and 16. The trans influence is small for group 16 donor atoms and for nitrogen, but for phosphorus it is significantly greater than the other donor atoms studied.
机译:在295,250,250℃下测定了顺式-二氯双(二苄硫基-κS)铂(II)的两种多晶型物的结构,一种是三斜晶型,另一种是单斜晶型。 200、150和100K。在两种多晶型物中,配合物均具有铂(II)配位两个二苄硫醚分子和两个氯配体的结构,从而形成具有伪正方形平面配位几何形状的配合物。三斜晶型在所有温度下均显示无序。两种多晶型物都具有涉及中心对称结构二聚体的堆积排列。 cis-PtCl2(Bz(2)S)(2)属于一组具有通式PtX2L2的配合物,其中X是卤素,L是带有来自第14、15或16组供体原子的配体。已研究了在剑桥结构数据库(CSD,版本5.28,2006年11月)中找到的173种cis-PtX2L2化合物的结构分类。主要的结构分类[根据Belsky&Zorkii(1977)的注解。 Acta Cryst。 A33,1004-1006]中的顺式化合物为P2(1)/ c,Z = 4(1)(73个结构,42%),其后是P(1),超过bar,Z = 2(1)(33个结构,19%)。反转中心与丝杠轴/滑移平面相结合是主要的填充运算符(56%),其次是反转中心(21%)。使用来自CSD的数据研究了顺式/反式-PtCl2L2化合物中的顺式和反式影响。对于第15和16组中的供体原子而言,顺式影响较小。对于第16组中的供体原子和氮而言,反式影响较小,但对磷而言,其影响显着大于其他研究的供体原子。

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