Synthesis, crystal structures and properties of quasi-one-dimensional platinum compounds

被引：20
|
作者：
Bremi, J [1 ]
Gramlich, V [1 ]
Caseri, W [1 ]
Smith, P [1 ]
机构：
[1] ETH Zentrum, CH-8092 Zurich, Switzerland
来源：
INORGANICA CHIMICA ACTA | 2001年 / 322卷 / 1-2期
关键词：
crystal structures; platinum complexes; amine complexes; one-dimensional complexes;
D O I：
10.1016/S0020-1693(01)00551-5
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Quasi-one-dimensional complexes of the type [Pt(NH2R)(4)][Pt(mnt)(2)] where mnt designates maleodinitriledithiolate and R an ethyl (Et) or octyl (Oc) group, were synthesized and characterized. Single-crystal X-ray diffraction revealed that both compounds crystallized in the triclinic. space group P1. The platinum atoms were arranged in linear arrays in both compounds; while the Pt-Pt distances were equal in [Pt(NH2Et)(4)][Pt(mnt)(2)] (3.96 Angstrom), surprisingly, two different intermetallic. spacings (3.86 and 4.01 Angstrom) were observed in [Pt(NH(2)Oc)(4)][Pt(mnt)(2)]. The Pt-Pt distances in the [Pt(NH2R)(4)][Pt(mnt)(2)] compounds are large compared to those in the typical Magnus-salt-type complexes (3.15-3.62 Angstrom). An uncommon, reversible solid-state phase transition was detected for [Pt(NH(2)Oc)(4)][Pt(mnt)(2)] at 70 degreesC, which might be related to a change in the packing of the octyl chains. The platinum stacks decayed when in solution, yielding predominantly ion pairs. The UV-Vis absorption spectra of such solutions were dominated by characteristics associated with [Pt(mnt)(2)](2-) units, and UV emission maxima were found at 345 and 363 mn upon excitation with light of wavelengths between 250 and 340 mn. (C) 2001 Elsevier Science B.V. AR rights reserved.
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页码：23 / 31
页数：9
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