925681-01-2Relevant academic research and scientific papers
Trichloroberyllate complexes of dimethyl cyanamide, morpholine, and 4,4′-bipyridine
Neumueller, Bernhard,Dehnicke, Kurt
, p. 1206 - 1212 (2006)
The trichloroberyllate complexes (Ph4P)[BeCl 3(NCNMe2)] (1), (Ph4P)[BeCl 3{HN(CH2)4O}] (2), and (Ph4P) 2[(BeCl3)2(4,4′-bipy)] (3) were prepared by reactions of (Ph4P)2[Be2Cl6] with dimethyl cyanamide, trimethylsilylmorpholinate, and 4,4′-bipyridine, respectively, in dichloromethane solutions. 1-3 were characterized by X-ray crystallography and by IR-spectroscopy. 1·CH2Cl2: Space group P1, Z = 1, lattice dimensions at 173 K: a = 714.2(1), b = 919.5(2), c = 1233.4(2) pm, α = 94.97(1)°, β = 90.86(1)°, γ = 111.90(1)°, R1 = 0.0310. In the complex anion [BeCl 3(NCNMe2)]- the dimethyl cyanamide ligand is coordinated via a linear Be-N≡C-NMe2 arrangement, the CH 2Cl2 molecules forming linear chains by hydrogen bridges ...HCH...Cl... with the chlorine atoms of the {BeCl 3-} groups. 2: Space group P1, Z = 2, lattice dimensions at 173 K: a = 1050.9(1), b = 1099.7(1), c = 1308.3(2) pm, α = 87.57(1)°, β = 70.97(1)°, γ = 74.58(1)°, R1 = 0.0397. The complex anions are dimerized by centrosymmetric puckered eight-membered [Be-N-H...Cl]2 rings. 3·2CH 2Cl2: Space group P1, Z = 2, lattice dimensions at 173 K: a = 1095.4(1), b = 1559.6(2), c = 1869.8(3) pm, α = 79.12(1)°, β = 73.83(1)°, γ = 78.76(1)°, R1 = 0.0548. The complex contains dianions [Cl3Be(μ-bipy)BeCl3]2- with Be-N distances of 177.0(6) and 178.5(6) pm. Both {BeCl3) - groups form C-H...Cl hydrogen bridges with the dichloromethane molecules.
