名称:
                                Low‐Valent Organobismuth Compounds with Intramolecular Coordination:
            cyclo
            ‐R
            3
            Bi
            3
            ,
            cyclo
            ‐R
            4
            Bi
            4
            , RBi[W(CO)
            5
            ]
            2
            , and R
            4
            Bi
            2
            [R = 2‐(Me
            2
            NCH
            2
            )C
            6
            H
            4
            ]
                             
                            
                                摘要:
                                AbstractThe cyclobismuthanes RnBin, [R = 2‐(Me2NCH2)C6H4; n = 3 (1a), 4 (1b)] have been synthesised by reduction of RBiCl2 with Na in liquid NH3 or by reaction of R2BiCl with LiAlH4 in Et2O. The reaction of 1a/b with W(CO)5·THF afforded the bismuthinidene complex RBi[W(CO)5]2 (2). R2BiCl reacts with Mg in THF to give the dibismuthane R4Bi2 (3). Single‐crystal X‐ray structure analyses of 1b, 2, and 3 reveal intramolecular coordination of the pendant CH2NMe2 groups to the bismuth atom. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)