175605-34-2Relevant academic research and scientific papers
Derivatives of the Dimethylbis(2-pyridyl)borate(1-) Ion: Synthesis and Structure
Hodgkins, Thomas G.,Powell, Douglas R.
, p. 2140 - 2148 (1996)
The syntheses and structures of derivatives of a novel uninegative bidentate ligand, the dimethylbis(2-pyridyl)borate anion, (py)2BMe2-, are reported. Lithium dimethylbis(2-pyridyl)borate, Li(py)2BMe2, was prepared by adding a solution of bromodimethylborane to a solution of 2-lithiopyridine in a 1:2 molar ratio, respectively; subsequent hydrolysis afforded hydrogen dimethylbis(2-pyridyl)borate, H(py)2BMe2, in 44% yield. Reaction of Li(py)2BMe2 with either bromodimethylborane or bromodiphenylborane afforded the corresponding tricyclic bis(organo)boronium dimethylbis(2-pyridyl)borate species R2B(μ-py)2BMe2(R = CH3, C6H5) in approximately 90% yields. Reaction of H(py)2BMe2 with anhydrous zinc(II) chloride or nickel(II) chloride hexahydrate in a 4:1 molar ratio gave the tetrahedral complex bis[dimethylbis(2-pyridyl)borato-N,N']zinc(II), Zn{(μ-py)2BMe2}2, or the square planar complex bis[dimethylbis(2-pyridyl)borato-N,N']nickel(II), Ni{(μ-py)2BMe2}2, respectively. H(py)2BMe2is monoclinic, P21/m, with a = 8.836(2) A?, b = 7.1825(5) A?, c = 9.2789(11) A?, β = 99.81(2)°, V = 580.29(13) A?3 and Z = 2. Ph2B(μ-py)2BMe2 is monoclinic, P21/n, a = 8.0334(12) A?, b = 10.9169(9) A?, c = 22.981(2) A?, β = 94.653(9)°, V = 2008.8(4) A?3, and Z = 4. Zn{(μ-py)2BMe2}2 is monoclinic, Cc, with a = 8.010(2) A?, b = 31.256(3) A?, c = 18.753(3) A?, β= 90.83(2)°, V = 4694.8(13) A?3, and Z = 8. Ni{(μ-py)2BMe2}2is triclinic, P1?, with a = 7.675(2) A?, b = 8.819(2) A?, c = 9.459(2) A?, α = 115.72(3)°, β= 96.89(3)°, γ = 94.02(3)°, and Z = 1.
