Exchange of Alkyl and Tris(2-mercapto-1-t-butylimidazolyl)hydroborato Ligands Between Zinc, Cadmium and Mercury.
Thetris(2-mercaptoimidazolyl)hydroborato ligand, [TmBut], has been used to investigate the exchange of alkyl and sulfur donor ligands between the Group 12 metals, Zn, Cd and Hg. For example, [TmBut]2Zn reacts with Me2Zn to yield [TmBut]ZnMe, while [TmBut]CdMe is obtained readily upon reaction of [TmBut]2Cd with Me2Cd. Ligand exchange is also observed between different metal centers. For example, [TmBut]CdMe reacts with Me2Zn to afford [TmBut]ZnMe and Me2Cd. Likewise, [TmBut]HgMe reacts with Me2Zn to afford [TmBut]ZnMe and Me2Hg. However, whereas the [TmBut] ligand transfers from mercury to zinc in the methyl system, [TmBut]HgMe/Me2Zn, transfer of the [TmBut] ligand from zinc to mercury is observed upon treatment of [TmBut]2Zn with HgI2to afford [TmBut]HgI and [TmBut]ZnI. These observations demonstrate that the phenomenological preference for the [TmBut] ligand to bind one metal rather than another is strongly influenced by the nature of the co-ligands.
Department of Chemistry, Columbia University, New York, New York 10027, USA.
Ava
A
Kreider-Mueller
Department of Chemistry, Columbia University, New York, New York 10027, USA.
Patrick J
PJ
Quinlivan
Department of Chemistry, Columbia University, New York, New York 10027, USA.
Yi
Y
Rong
Department of Chemistry, Columbia University, New York, New York 10027, USA.
Jonathan S
JS
Owen
Department of Chemistry, Columbia University, New York, New York 10027, USA.
Gerard
G
Parkin
Zinc; alkyl; cadmium; exchange; mercury; tris(2-mercaptoimidazolyl)hydroborato