An-Najah Staff

C33H40Cl2N2P2Ru, triclinic, P1 (no. 2), a = 9.870(1) Å, b = 13.044(1) Å, c = 14.446(3) Å, + = 110.86(1)°, * = 100.55(1)°, & = 107.657(9)°, V = 1565.2 Å3, Z = 2, Rgt(F) = 0.028, wRref(F2) = 0.067, T = 173 K.

Molecular rutheniumcomplexesarecurrentlyusedascatalysts to promote avariety of reactions with novel activation routes. Coordination and organometallic complexes of rutheniumhave unfolded wide possibilities for acollection of catalytic organic processes, taking advantages of the development in the

The novel diamine(dppp)ruthenium(II) complexes 3L1–3L12 have been obtained by reaction of equimolar amounts of Cl2Ru(dppp)2 (2) with the diamines L1–L12 in excellent yields. Within a few minutes one of the diphosphine ligands was quantitatively exchanged by the corresponding diamine. X-ray structural investigations of 3L1, 3L2, and 3L8 show triclinic unit cells with the space groups PView the MathML source (3L1, 3L2) and P 1 (3L8). Whereas in solution all these complexes prefer a trans-RuCl2 configuration, in the solid state cis-(3L1, 3L2) and trans-isomers (3L8) were observed. With the exception of 3L5, 3L6, and 3L12 all mentioned ruthenium complexes are highly catalytically active in the hydrogenation of the α,β-unsaturated ketone trans-4-phenyl-3-butene-2-one. In most cases the conversions and selectivities toward the formation of the unsaturated alcohol trans-4-phenyl-3-butene-2-ol were >99% with high turnover frequencies (TOFs) under mild conditions.