Cyclische Diazastannylene. - XVIII : Zur Frage der Bindungsbeschreibung in Polyedern des Typs Sn4X3Y : die Kristall- und Molekülstrukturen von Sn4(NtBu)4 und Sn4(NtBu)3O

IF 0.8 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Zeitschrift Fur Naturforschung Section B-A Journal of Chemical Sciences Pub Date : 1983-01-01 DOI:10.22028/D291-24001

M. Veith, O. Recktenwald

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Abstract

Crystals of Sn4(NtBu)4 (1) are monoclinic, space group P2(1/c), with cell constants a=1038.9(4), b=1468.3(5), c=1698.8(5) pm, beta=91.6(1)° and Z=4, while those of Sn4(NtBu)3O (2) are triclinic, space group P(-)1, with dimensions a=1293.0(5), b=1027.1(5), c=1716.7(9) pm, alpha=90.9(1), beta=102.5(1), gamma=107.0(1)° and Z=4. The molecules 1 are held together by von-der-Waals forces, whereas two molecules 2 interact in the crystal by weak O --> Sn donor bonds (290-332 pm) forming dimers. The outstanding structural elements of 1 and 2 are the Sn4N4 and Sn4N3O polyhedra, which can be described by two interpenetrating tetrahedra of tin atoms and of nitrogen or nitrogen and oxygen atoms forming a distorted cube, which approaches (-)43m symmetry in the case of 1 and 3m for 2. Characteristic distances are in 1: Sn-N 220.2 pm, in 2: Sn-N 221.3 pm and Sn-O 213.2 pm. An almost ionic bonding model and two covalent models are discussed on the basis of the structural data including Sn4(NtBu)3OAlMe3.

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Cyclische Diazastannylene .在试图比较s4x3y对象的结合描述时，s4x3y是s4和s4的晶体和分子结构

Sn4(NtBu)4(1)为单斜晶系，空间群P2(1/c)，胞元常数a=1038.9(4)， b=1468.3(5)， c=1698.8(5) pm， β =91.6(1)°，Z=4; Sn4(NtBu) 30(2)为三斜晶系，空间群P(-)1，胞元尺寸a=1293.0(5)， b=1027.1(5)， c=1716.7(9) pm， α =90.9(1)， β =102.5(1)， γ =107.0(1)°，Z=4。分子通过范德瓦尔斯力结合在一起，而两个分子通过弱的O -> Sn供体键(290- 332pm)在晶体中相互作用，形成二聚体。1和2的突出结构元素是Sn4N4和sn4n30多面体，可以用两个锡原子和氮原子或氮原子和氧原子相互穿透的四面体形成一个扭曲的立方体来描述，在1的情况下接近(-)43米对称，在2的情况下接近3米对称。特征距离分别为1∶Sn-N 220.2 pm、2∶Sn-N 221.3 pm和Sn-O 213.2 pm。根据Sn4(NtBu)3OAlMe3的结构数据，讨论了近离子键模型和两种共价模型。

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来源期刊

Zeitschrift Fur Naturforschung Section B-A Journal of Chemical Sciences 化学-无机化学与核化学

CiteScore

1.80

自引率

12.50%

发文量

期刊介绍： Zeitschrift fuer Naturforschung B (ZNB) publishes novel research in all areas of inorganic chemistry, organic chemistry, and analytical chemistry. In particular, the journal focuses on solid state chemistry, coordination chemistry, main group element chemistry, synthetic organic chemistry, natural product chemistry and, to a lesser extent, on analytical chemistry. For more than 65 years Zeitschrift fuer Naturforschung B has been open to contributions from all fields of experimental and theoretical chemistry. Zeitschrift fuer Naturforschung B publishes 12 issues per volume/year. Sometimes double issues occur. Topics Solid state chemistry Coordination chemistry Main group element chemistry Organic chemistry Natural product chemistry.