Synthesis and Spectroscopy of Mononuclear and Dinuclear Copper-Complexes of a Pyrazolylcyclotriphosphazene - Crystal-Structure of an Unusual Cyclotriphosphazene-Bridged Dicopper Complex

by Thomas, K. R. Justin; Chandrasekhar, Vadapalli; Scott, Syrona Renae Horton; Hallford, Randal L.; Cordes, A. Wallace

The mononuclear copper(II) complexes [CuL(ClO4)(H2O)2]ClO4 and [CuL(bipy)(ClO4)]ClO4 [L = 2,2,4,4,6,6-hexakis(3,5-dimethylpyrazolyl)-2lambda5,4lambda5,6lambda5-cyclotriphosphaza-1,3,5-triene] have been prepared and characterized by optical, EPR and IR spectral data. The crystal structure of an unusual cyclophosphazene-bridged dicopper complex [H2dmpz][(CuCl2)2{N3P3O(dmpz)5}] (Hdmpz = 3,5-dimethylpyrazole) has been determined: space group P1bAR, a = 11.640(3), b = 14.497(14). c = 14.775(3), alpha = 77.62(6), beta = 82.10(2), gamma = 74.88(6)degrees, and Z = 2. The geometry around both copper atoms is a distorted trigonal bipyramidal with the axial positions occupied by pyrazolyl pyridinic nitrogens and the equatorial positions by one cyclophosphazene ring nitrogen and two chlorine atoms.

Journal
Journal of the Chemical Society-Dalton Transactions
Issue
17
Year
1993
Start Page
2589
ISBN/ISSN
1477-9234; 0300-9246
DOI
10.1039/dt9930002589