The Crystal Structure of Di-μ-Bromo-tris(triphenylphosphine)dicopper(II)

Abstract

The crystal structure of the Cu2Br2(PPh3)3·1.5C6H6 complex has been determined by three dimensional X-ray analysis. The crystals are monoclinic, and the space group is P21/c, with unit-cell parameters of a=14.122 (3), b=19.573 (4), c=25.985 (7) Å, β=128.99 (1)°, and Z=4. In the Cu2Br2(PPh3)3 molecule, one copper atom is three-coordinate, and the other, four-coordinate.

One‐Dimensional Polymers Based on [{CpMo(CO)2}2(μ,η2‐P2)]: Solid‐State Conformation Analysis by NMR Spectroscopy and DFT Calculations

“…[2] The lengths of the CuÀP bonds in 4 (2.282(2) and 2.304(2) ) and 5 (2.294(2) and 2.300(2) ) are slightly shorter than those in [{(triphos)CoP 3 } 2 Cu]PF 6 (triphos = 1,1,1-tris(diphenylphosphanylmethyl)ethane; 2.303(2)-2.360-(2) ), [6] whereas those of 6 (2.312 (1) ) lie within this range. The Cu À X bond lengths (2.348(2) and 2.360(2) (4); 2.472(1) and 2.481 (1) (5); 2.606(1) and 2.668 (1) (6)) are within the range of those reported for the compounds [Cu 2 -(PPh 3 ) 3 X 2 ] (X= Cl [7] 2.247(4)-2.454(4) , Br [8] 2.370(2)-2.610(2) , I [9] 2.500(2)-2.819 (1) ). The structures of the polymer cores are compared in Figure 4.…”

Influence of Copper Salts, Solvents, and Ligands on the Structures of Precatalytic Phosphoramidite Copper Complexes for Conjugate Addition Reactions

“…The crystal structures of triphenylphosphine Cu I halide complexes were chosen to be representative of a well-known and thoroughly investigated system composed of monodentate trivalent phosphorus ligands and Cu I salts, thus representing a wealth of different structures that, in principle, are also possible for phosphor-A C H T U N G T R E N N U N G amidite copper complexes. The structures shown in Figure 4d, [29] e, [30] and g [31] are indeed very similar to the known crystal structures of the phosphoramidite copper complexes discussed in the introduction. For the 1:1 ligand-to-copper salt ratios, the situation is more complicated.…”

P2-Ligand Complexes as Building Blocks for the Formation of One-Dimensional Polymers This work was supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie.

“…The Cu−P bonds of 5 (2.288(1) and 2.297(1) Å) are slightly shorter than those in [{(triphos)CoP 3 } 2 Cu]PF 6 ⋅2 THF (2.360(2), 2.320(2), 2.303(2), and 2.329(2) Å). The Cu−Br bond of 5 (2.466(1) Å) is within the range displayed by the bromide‐bridged complex [Cu 2 (PPh 3 ) 3 Br 2 ] (2.370(2)–2.610(2) Å) 15. The formation of 5 shows on the one hand the different coordination behavior of the Mo 2 P 2 complex 1 with CuBr compared to the cyclo ‐P 3 complexes [(triphos)M( η 3 ‐P 3 )] (M=Co, Rh, or Ir) with CuBr 6.…”