Linear Chain Formation by an Oxovanadium(V) Complex of p-Methylhexahomotrioxacalix[3]arene
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- 作者：Philip D. Hampton ; Charles E. Daitch ; Todd M. Alam ; and Eugene A. Pruss
- 刊名：Inorganic Chemistry
- 出版年：1997
- 出版时间：June 18, 1997
- 年：1997
- 卷：36
- 期：13
- 页码：2879 - 2883
- 全文大小：177K
- 年卷期：v.36,no.13(June 18, 1997)
- ISSN：1520-510X
文摘
The oxovanadium(V) complex <B>4 can be readily synthesizedby the reaction of the lithium salt ofp-methylhexahomotrioxacalix[3]arene trianion 3 withVOCl3. Infrared spectra indicate a terminal V=O forcomplex 4in solution and V=O···V dative interactions in the solid stateconsistent with the formation of a 
-oxo-bridgedlinear chain polymer 1 (M = V, Y = O, X3 =trianion of macrocycle 2a). Vanadium-51 NMR spectraindicateincreased shielding for the linear chain polymer in the solid statecompared to complex 4 in solution. Complex4 and its linear chain polymer are proposed to have theoxovanadium group contained within the cup of themacrocycle ligand as shown in structures 5 and 7,respectively, where the cone represents macrocycle2a.
-oxo-bridgedlinear chain polymer 1 (M = V, Y = O, X3 =trianion of macrocycle 2a). Vanadium-51 NMR spectraindicateincreased shielding for the linear chain polymer in the solid statecompared to complex 4 in solution. Complex4 and its linear chain polymer are proposed to have theoxovanadium group contained within the cup of themacrocycle ligand as shown in structures 5 and 7,respectively, where the cone represents macrocycle2a.