717832-41-2Relevant academic research and scientific papers
Chloroberyllates with Nitrogen Donor Ligands (see abstract)
Neumueller, Bernhard,Dehnicke, Kurt
, p. 2529 - 2534 (2003)
The title compounds were obtained as colourless, moisture sensitive crystals by reactions of (Ph4P)2[Be2Cl 6] with pyridine, tmeda (N,N′-tetramethylethylendiamine), or with the silylated benzamidine PhC-[N(SiMe3)2(NSiMe 3)], whereas the tetrachloro beryllate was isolated as a by-product from a solution in dichloromethane in the presence of the silylated phosphaneimine Me3SiNP(tol)3. All compounds were characterized by crystal structure determinations and by IR spectroscopy. (Ph4P)[BeCl3(Py)] (1): Space group Pbcm, Z = 4, lattice dimensions at 193 K: a = 756.2(1), b = 1739.2(2), c = 2016.3(2) pm, R 1 = 0.0626. The complex anion contains tetrahedrally coordinated beryllium atom with a Be-N distance of 176.5 pm. (Ph4P) 2[(BeCl3)2(tmeda)]·2CH 2Cl2 (2·2CH2Cl2). Space group P1, Z = 1, lattice dimensions at 193 K: a = 1072.7(1), b = 1132.6(1), c = 1248.9(1) pm, α = 95.34(1)°, β = 92.80(1)°, γ = 90.81(1)°, R1 = 0.0344. Both nitrogen atoms of the tmeda molecule coordinate with BeCl3- units forming the centrosymmetric complex anion with Be-N distances of 181.3 pm. (PPh 4)[BeCl2{(Me3SiN)2CPh}] (3). Space group C2, Z = 2, lattice dimensions at 193 K: a = 1255.4(2), b = 1401.9(2), c = 1085.2(2) pm, R1 = 0.0288. In the complex anion the benzamidinato ligand {(Me3SiN)2CPh}- acts as chelate with Be-N distances of 174.9 pm. (Ph4P)2[BeCl 4]·CH2Cl2 (4·2CH 2Cl2). Space group P2/c, Z = 4, lattice dimensions at 193 K: a = 2295.4(1), b = 982.5(1), c = 2197.2(2) pm, β= 99.19(1)°, R 1 = 0.0586. 4·2CH2Cl2 contains nearly ideal tetrahedral [BeCl4]2- ions, like the previously described 4·2,5CH2Cl2, which crystallizes in the space group P1, with Be-Cl distances of 203.4 pm on average.
