Polyhedron p. 983 - 991 (1998)
Update date:2022-07-29
Topics:
Koide, Yoshihiro
Francis, Julie A.
Bott, Simon G.
Barron, Andrew R.
Reaction of Ga(tBu)3 with the 1,3-diphenylamidine [PhN(H)C(H)=NPh, H-dpam] yields monomeric (tBu)2Ga(dpam) (1). The partial hydrolysis of 1 results in the isolation of (tBu)2Ga(μ-dpam)(μ-OH)Ga(tBu)2 (2), whose structure consists of a gallium dimer in which the amidine and hydroxide ligands bridge two Ga(tBu)2 moieties. Reaction of [Me2Ga(μ-Cl)]2 with H-dpam results in the complex [H2-dpam] [Me2GaCl2] (3). The solid state structure of 3 indicates the presence of a hydrogen bonded cation-anion complex, in which the core has a twisted eight-membered ring configuration. The versatility of amidines as both chelating and bridging ligands to gallium is discussed with respect to the predominance of bridging and chelating modes of coordination of carboxylates and triazenides, respectively. Reaction of 2-(methylamino)pyridine (H-map) with Ga(tBu)3 allows for the isolation of (tBu)2Ga(map) (4). In contrast, reaction with [(tBu)2Ga(μ-Cl)]2 and [Me2Ga(μ-Cl)]2 yields the Lewis acid base adducts, (tBu)2GaCl(H-map) (5) and Me2GaCl(H-map) (6), respectively. Reaction of compound 6 with nPrNH2 does not result in the deprotonation of the H-map ligand, but ligand metathesis and the formation of (tBu)2GaCl(NH2nPr) (7). The structures of 2, 3, 6, and 7 have been determined by X-ray crystallography.
Qingdao XinYongAn Chemicals Co., Ltd
Contact:+86-532-81107967
Address:Chengyang dual-port industrial park by the sea，Qingdao
Contact:+8613400661290
Address:No 908,Kangwan Rd, Liuyang Economic
WENZHOU M&C FOREIGN TRADE CO.,LTD.
Contact:+86-577-88862917
Address:No.8 Liming West Road,Wenzhou,zhejiang,China
Hubei Lingsheng Pharmaceuticals Co., Ltd.
Contact:+86-0710-3538058
Address:Xiangyang City Xiangcheng Economic Development Zone, Hubei Province
Shanghai Bosman Industrial Co., Ltd
Contact:86-21-63065878-8006
Address:Rm907, No.1611, North Sichuan Road, Hongkou District, Shanghai, 200080 China
Doi:10.1002/hlca.19680510816
(1968)Doi:10.1016/S0040-4039(98)00784-9
(1998)Doi:10.1016/S0957-4166(98)00144-X
(1998)Doi:10.1016/S0008-6215(00)80158-5
(1968)Doi:10.1080/10426509708545613
(1997)Doi:10.1021/jo980170i
(1998)
