期刊
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
卷 646, 期 13, 页码 909-914出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/zaac.202000147
关键词
Isocyanides; Rhenium; Oxido complexes; Bulky ligands
资金
- DAAD (German Academic Exchange Service)
- Alexander von Humboldt Foundation
Reactions of the sterically encumbered m-terphenyl isocyanides CNArDipp2 (Dipp = 2,6-diisopropylphenyl) and CNArMes2 (Mes = 2,4,6-trimethylphenyl) with (NBu4)[ReOCl4] in CH2Cl2 form stable complexes of the composition (NBu4)[ReOCl3(CNAr(R))] or [ReOCl3(CNAr(R))(2)] depending on the amount of isocyanide added. In the [ReOCl3(CNAr(R))(2)] complexes, cis coordination of the two isocyanides is observed for CNArMes2, while the sterically more demanding CNArDIPP2 ligands are found in trans positions. The rhenium(III) species [ReCl3(PPh3)(CNArMes2)(2)] was obtained from the reaction of [ReOCl3(PPh3)(2)] and CNArMes2. The nu(CN) IR frequencies measured for the Re-V complexes appear at higher wavenumbers than for the uncoordinated isocyanides, which suggests a low degree of backdonation into anti-bonding orbitals of these ligands.
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