60458-18-6Relevant articles and documents
Synthesis and Structure of Monoorganobismuth Compounds Bearing Pyridinedimethoxide Ligands
Shimada, Shigeru,Rao, Maddali L. N.,Tanaka, Masato
, p. 931 - 936 (2008/10/08)
Monoorganobismuth compounds bearing pyridinedimethoxide ligands [2,6-C5H3N-(CR12O)2] 2- (R1 = Me, Et, iPr) have been synthesized. The ligand exchange reaction of PhBi-(OEt)2, which was in situ generated from PhBiBr2 and 2 equiv of NaOEt, with [2,6-C5H3N(CR12OH)2] (1a, R1 = Me; 1b, R1 = Et; 1c, R1 = iPr) gave PhBi[2,6-C5H3N(CR12O)2] (5a, R1 = Me; 5b, R1 = Et; 5c, R1 = iPr) in 57-78% yields. A similar reaction of MeBi(OEt)2 with 1a gave MeBi[2,6-C5H3N(CMe2O)2] (5d) in 96% yield. (EtO)Bi[2,6-C5H3N(CEt2O)2] (5e) was also synthesized by the reaction of Bi(OEt)3 with 1b in 61% yield. The structures of 5a-5c and 5e were characterized by X-ray structure analysis. Compounds 5a-5c and 5e form dimers in the solid state through the intermolecular coordination of the oxygen atoms to the bismuth atoms. The intermolecular Bi-O distances highly depend on the bulkiness of R1 groups and range from 2.699(2) ? (5a) to 3.581(3) ? (5c). In solution at room temperature, on the other hand, 5a-5e exist as monomers judging from NMR spectra in CDCl3 and/or toluene-d8.
