title: Synthesis and structures of hypervalent organoantimony and organobismuth chlorides containing asymmetric C,E,C-chelating (E = O, S) ligands.
abstract: Two asymmetric tridentate C,E,C-chelating ligand precursors, 1-Br-2-[(2'-BrC6H4CH2E)CH2]C10H6 (E = O (1), E = S (2), were prepared in good yield. Lithiation of the two precursors was achieved by a reaction with n-BuLi, and was followed by treatment with SbCl3 or BiCl3 in a 1: 1molar ratio to give four air-stable hypervalent organoantimony and organobismuth chlorides with an asymmetric C,E,C-chelating ligand (E = O, S), i.e. (C6H4CH2OCH2C10H6)SbCl (3), (C6H4CH2SCH2C10H6)SbCl (4), (C6H4CH2OCH2C10H6)BiCl (5) and (C6H4CH2SCH2C10H6)BiCl (6). These compounds were characterized by NMR spectroscopy, elemental analysis and melting point determination. X-ray structure analysis of compounds 3-6 revealed that the donor atoms (O, S) are strongly coordinated to the metal atoms (Sb, Bi). Compounds 3-6 exhibit chirality and crystallize as racemic mixtures.
authors: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
authors: Nianyuan
authors: N
authors: Tan
authors: Yi
authors: Y
authors: Chen
authors: Shuang-Feng
authors: SF
authors: Yin
authors: Renhua
authors: R
authors: Qiu
authors: Yongbo
authors: Y
authors: Zhou
authors: C T
authors: CT
authors: Au
mesh_terms: D000965:Antimony / Q000737:chemistry*; D001729:Bismuth / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D002712:Chlorides; D008024:Ligands; D009942:Organometallic Compounds; D000965:Antimony; D001729:Bismuth