Article ID Journal Published Year Pages File Type
1308753 Inorganica Chimica Acta 2009 7 Pages PDF
Abstract

The compounds W(CO)5P(C6H4-4-CH2CH2(CF2)7CF3)3 (1) and W(CO)5P(CH2CH2(CF2)5CF3)3 (2) were synthesized in order to probe the electronic and physical effects of ligation by perfluorocarbon substituted tertiary phosphine ligands in a W(CO)5L complex. The π-accepting ability of the fluorous phosphines was found to rank with non-fluorous comparators as P(CH2CH2(CF2)5CF3)3 > P(C6H4-4-CH2CH2(CF2)7CF3)3 > PPh3 > P(p-tolyl)3 > P(n-octyl)3. The X-ray crystal structure of W(CO)5P(C6H4-4-CH2CH2(CF2)7CF3)3 shows strong intermolecular association of fluorous components but confirms that the para fluorocarbon subtituents have an insignificant effect on the tungsten coordination environment. Partition coefficients (toluene/perfluoromethylcyclohexane) were measured for compounds 1 and 2.

Graphical abstractThe electronic effects to W(CO)5L upon coordination by fluoroponytailed tertiary phosphines are described. The solid-state structural effects of ligation by P(C6H4-4-CH2CH2(CF2)7CF3)3 versus ligation by P(C6H5)3 are reported.Figure optionsDownload full-size imageDownload as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemistry Inorganic Chemistry
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