摘要:
Four complexes of the type [Cu4I4(CH3CN)(2)(L)(2)], L=aniline derivative: Cu4I4(CH3CN)(2)(2,6-dimethylaniline)(2) (I), triclinic, P $$(1) over bar, a=12.449(3), b=14.108(6), c= 10.606(4) Angstrom, (alpha=73.46(3)), beta=95.00(2), gamma =73.42(3)degrees, V=1682.3(10)Angstrom(3); CU4I4(CH3CN)(2)(o-ethylaniline)(2) (II), triclinic, P $$(1) over bar, a=12.224(2), b=14.073(5), c=12.198(4) Angstrom, alpha= 114.32(2), beta=87.85(2), gamma=68.45(2)degrees, V= 1734.0(8) Angstrom(3); CU4I4(CH3CN)(2)(6-ethyl-o-toluidine)(2) (III), orthorhombic, Pnam, a=14.976(6), b=21.187(6), c=12.545(2) Angstrom, V=3980.7(2) Angstrom(3); Cu4I4(CH3CN)(2)(p-anisidine)(2) (IV), monoclinic, A2/a, a=20.032(10), b=7.863(1), c=18.715(9) Angstrom, beta=101.56(4)degrees, V=2888.0(2) Angstrom(3); were examined by single crystal X-ray diffraction. Complexes I and II have no internal symmetry elements, III has an internal minor and IV has a two-fold axis. Ab initio calculations based on the atomic positional parameters of complexes containing the three types of symmetry elements reveal HOMO orbitals to be dominated by the p orbitals of the iodine atoms whereas the LUMO orbitals contain major contributions from copper based p orbitals.