名称:
‘Unsymmetric’ palladium(II) complexes with ligand 4′,5′-diaza-9′-(4,5-disubstituted-1,3-dithiole-2-ylidene)-fluorene
摘要:
Four 'unsyminetric' complexes of palladium(II), [Pd(L)Cl-2] and [Pd(L)(dmit)], have been synthesized and characterized [L = 4', 5'-diaza-9'-(4.5-bis(methylthio)-1,3-dithiole-2-ylidene)-fluorene (L-1) and 4',5'-diaza-9'-(4,5-ethylenedithio-1,3-dithiole-2-ylidene)-fluorene (L-2)]. Single crystal Structure of [Pd(L-1)Cl-2] was determined, in which, the atoms of the molecule, except two methyl-groups, are conjugated in a quasi-plane. The planar molecules are further stacked forming two unequivalent columns with C...C, S...C and S...Cl contacts. The differences between dichloro complexes and dmit complexes in IR, UV and oxidation properties were discussed in detail. The dmit complexes exhibit LLCT hand from dmit (donor) to pi* of L-1 (acceptor). (C) 2003 Elsevier Science B.V. All rights reserved.