American Chemical Society
Browse
ic000928s_si_002.pdf (490.24 kB)

Diverse Solid-State and Solution Structures within a Series of Hexaamine Dicopper(II) Complexes

Download (490.24 kB)
journal contribution
posted on 2001-02-03, 00:00 authored by Paul V. Bernhardt
Mono- and dicopper(II) complexes of a series of potentially bridging hexaamine ligands have been prepared and characterized in the solid state by X-ray crystallography. The crystal structures of the following CuII complexes are reported:  [Cu(HL3)](ClO4)3, C11H31Cl3CuN6O12, monoclinic, P21/n, a = 8.294(2) Å, b = 18.364(3) Å, c = 15.674(3) Å, β = 94.73(2)°, Z = 4; {[Cu2(L4)(CO3)]2}(ClO4)4·4H2O, C40H100Cl4Cu4N12O26, triclinic, P1̄, a = 9.4888(8) Å, b = 13.353(1) Å, c = 15.329(1) Å, α = 111.250(7)°, β = 90.068(8)°, γ = 105.081(8)°, Z = 1; [Cu2(L5)(OH2)2](ClO4)4, C13H36Cl4Cu2N6O18, monoclinic, P21/c, a = 7.225(2) Å, b = 8.5555(5) Å, c = 23.134(8) Å, β = 92.37(1)°, Z = 2; [Cu2(L6)(OH2)2](ClO4)4·3H2O, C14H44Cl4Cu2N6O21, monoclinic, P21/a, a = 15.204(5) Å, b = 7.6810(7) Å, c = 29.370(1) Å, β = 100.42(2)°, Z = 4. Solution spectroscopic properties of the bimetallic complexes indicate that significant conformational changes occur upon dissolution, and this has been probed with EPR spectroscopy and molecular mechanics calculations.

History