ISSN:
0009-2940
Keywords:
Phosphane ligands, tripodal
;
Molybdenum complexes
;
Iridium complexes
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The synthesis of the novel potentially bistripodal ligand cis-cis-1,3,5-tris(cyano)-1,3,5-tris(diphenylphosphanyl)cyclohexane (tdppcycn) (6) is described. Starting from the tricarboxylic acid cis,cis-1,3,5-C6H9(COOH)3 (1), which is converted stepwise into the triacid chloride cis,cis-1,3,5-C6H9(COCl)3 (2), the triphenyl ester cis,cis-1,3,5-C6H9(COOPh)3 (3), the tricarboxamide cis,cis-1,3,5-C6H9(CONH2)3 (4), and the tricarbonitrile cis,cis-1,3,5-C6H9(CN)3 (5), we obtained tdppcycn (6) by α-deprotonation of 5 followed by treatment with ClPPh2 in good yield. Treatment of 6 with Mo(CO)3(-C7H8) and Ir(PPh3)2(CO)Cl gave octahedral Mo(tdpp-cycn)(CO)3 (7) and pentacoordinate Ir(tdppcycn)(CO)Cl (8), respectively, with a facially P-coordinated tdppcycn ligand. The stereochemistry of compounds 2-8 was established by 1H-, 13C-, 31P-NMR, and IR spectroscopy. An X-ray crystal structure analysis of complex 8 confirms the trigonal-bipyramidal ground-state structure in the solid state.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19951280710
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