A new C-anionic tripodal ligand 2-{bis(benzothiazolyl)(methoxy)methyl}phenyl and its bismuth complexes

摘要

A new tripodal C-anionic ligand, 2-{bis(benzothiazolyl)(methoxy)methyl}phenyl (L), was stably generated by the reaction of the ligand precursor (L '), the corresponding bromide (2-BrC6H4)(MeO)C(C7H4NS)(2) (C7H4NS = 2-benzothiazolyl), with nBuLi at -104 degrees C in the presence of TMEDA (N,N,N ',N '-tetramethylethylenediamine). The ligand lithium salt reacted with BiCl3 to give a 2 : 1 complex L2BiCl. A 1 : 1 complex LBiCl2 was obtained in good yield by the redistribution reaction between L2BiCl and BiCl3. X-ray diffraction analysis revealed that the ligand L coordinated in an expected kappa(3)-C,N,N ' coordination mode in LBiCl2, while it coordinated in kappa(3)-C,N,O and kappa(2)-C,O coordination modes in L2BiCl. The ligand precursor reacted with BiX3 (X = Cl, Br) to give 1 : 1 complexes L ' BiX3 and was found to act as a neutral tripodal C(pi),N,N-ligand.