Diphosphines as bridging ligands in polymeric and dimeric thione-S-ligated Ag(I) nitrate complexes

被引:39
作者
Aslanidis, P
Cox, PJ
Divanidis, S
Karagiannidis, P
机构
[1] Aristotle Univ Thessaloniki, Fac Chem, Inorgan Chem Lab, GR-54124 Thessaloniki, Greece
[2] Robert Gordon Univ, Sch Pharm, Aberdeen AB10 1FR, Scotland
关键词
silver(I) complexes; heterocyclic thiones; 1,2-bis(diphenylpliosphino)ethane; 1,4-bis(diphenylphosphino)butane; crystal structures;
D O I
10.1016/j.ica.2004.03.013
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Reactions of silver(l) nitrate with equimolar amounts of the diphos ligands 1,4-bis(diphenylphosphino)butane (dppb) or 1,2-bis(diphenylphosphino)ethane (dppe) and some heterocyclic thiones (L) in acetonitrile/methanol solvent afforded mixed-ligand complexes, the nature of which was found to be strongly influenced by the backbone length of the diphosphine ligand. The longer chained diphos ligand formed a series of dinuclear complexes of the type [Ag(dppb)(L)](2)(NO3)(2) with both the diphosphine and thione ligands acting as bridging ligands between the two four-coordinate pseudo-tetrahedrally coordinated metal centers. In the unique case of L = 4-methyl-5-trifluoromethyl-4H-1,2,4-triazoline-3 (2H)-thione (mftztH), the reaction proceeded under exclusion of the thione ligand from the coordination sphere and coordination of the nitrate anions instead, leading to the diphosphine-doubly bridged dimeric compound [Ag(dppb)(NO3)](2). On the other hand, the complexes produced when using the short bite 1,2-bis(diphenylphosphino)ethane (dppe) turned out to be diphosphine-bridged cationic polymers of the type [Ag(dppe)(L)(2)](n)(NO3)(n). The structures of one representative for each of the two aforementioned series of complex compounds, namely (Ag(dppb)(py2SH)]2 (NO3)(2) . 2H(2)O and [Ag(dppe)(pymtH)(2)](n)(NO3)(n), have been established by single-crystal X-ray diffraction. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:2677 / 2686
页数:10
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