186391-05-9Relevant academic research and scientific papers
Synthesis and structural characterization of magnesium and cobalt derivatives of the bulky aryl ligand -C6H3-2,6-Mes2
Ellison, Jeffrey J.,Power, Philip P.
, p. 263 - 267 (1996)
The synthesis and structural characterization of the new metal-terphenyl derivatives [BrMC6H3-2,6-Mes2(THF)]2 (M = Mg (1), Co (2); Mes = -C6H2-2,4,6-Me3) are described. The magnesium derivative 1 was synthesized by reaction of the previously known iodide IC6H3-2,6-Mes2 with activated magnesium. Subsequent treatment of 1 with CoCl2 affords 2 in moderate yield. Compounds 1 and 2 have very similar dimeric structures, in which two bromides bridge two metals. Each metal is also coordinated to a -C6H3-2,6-Mes2 group and a THF molecule. The metals are thus four-coordinated. The cobalt species 2 is a very unusual example of a stable Co(II) σ-bonded hydrocarbyl. The Co-Co separation of ca. 3.5 A precludes the existence of significant metal-metal bonding. Crystal data at 130K with Μ? Κα (λ = 0.71073 A) radiation: 1, a = 9.432(2), b = 21.973(5), c = 12.558(2)A, β = 94.87(2)°, Z = 2, monoclinic, space group P21/c, R = 0.058 for 3006( I > 2σ(I)) data, 2, a = 9.394(2), b = 22.033(7), c = 12.390(3)A, β = 94.99(2)°, Z = 2, monoclinic, space group P21/c, R = 0.077 for 2675( I > 2σ(I)) data.
