Geometric control of ground state multiplicity in a copper(I) bis(verdazyl) complexInorganic Chemistry (2010)
AbstractA copper(I) complex of a 3-(6′-isopropylpyridyl)-substituted verdazyl was synthesized and characterized by X-ray crystallography and magnetic susceptibility. The complex crystallizes in the monoclinic space group C2/c with cell dimensions a = 22.544 Å, b = 11.576 Å, c = 17.157 Å, β = 123.907°, V = 3716.2 Å3. The coordination geometry at copper is distorted tetrahedral, with the two ligand planes separated by 75°. Magnetic susceptibility measurements indicate that the ground state of the diradical is a triplet at this geometry. Fitting to a simple Heisenberg Hamiltonian (H = −JS1·S2) gave J = 47(1) cm−1. The triplet ground state results from exchange mediated by the copper ion; in particular, the direction of the distortion from tetrahedral geometry appears to be essential to maintain the high-spin ground state.
Citation InformationDavid J R Brook, Gordon Yee, Mike Hundley, David Rogow, et al.. "Geometric control of ground state multiplicity in a copper(I) bis(verdazyl) complex" Inorganic Chemistry Vol. 49 Iss. 18 (2010)
Available at: http://works.bepress.com/david_brook/3/