An-Najah Staff

Nowadays, due to economical and environmental inciting, in creasing attention is dedicated to catalysts and reagents [3,4]. An attractive strategy to consist in the homogenous catalysts by using dichloro(phosphine)diamineruthenium complexes in field of hy drogenation has been recently constructed [3-6]. The two hemi labile bidentate ether-phosphine ligands were coordinated the ruthenium(II) center atom via phosphor and oxygen atoms. The (ether) oxygen atom can easily be displaced by an incoming sub strate such as diamine [1,2,7,8]. Thus, ether-phosphines are capable of making available and protecting vacant coordination sites which lead to an improvement in both stability and catalytic activity of the organometallic species [7,8]. The title complex is crystallized as free solvated trans-dichlorocis-phosphine isomers with approximate C symmetry. The ruthenium atom is coordinated two chlorine species in trans form, one diamine co-ligand via the nitrogen atoms and two (2-methoxyethyl)(diphenyl)-phosphine ligands via the phosphorus atoms in cis forms. The complex exhibits mostly regular octahedron geometry around the ruthenium center atom with two Ru—N distances of 2.1993 Åand 2.1932 Å, two Ru—Cl distances of 2.4177 Åand 2.4244 Åand two Ru—P distances equal 2.2963 Åand 2.2910 Å. The diamine and ether-phosphine ligands are practically planar. (Deviations from the least-squares planes do not exceed 0.1 Å.) The coordination angle of the diamine chelate ring results in distinctly N–Ru–N angles of 84.71° departs from ideal value by up to approximately 5.3 Å, due to the six-membered ring chelating nature of 1,3-propanediamine ligand, while the P–Ru–P angle is equal 91.17°. The dichloro ligands are bent away from their axial positions toward the diamine ligand forming Cl–Ru–Cl angles of 165.61°, resonating to the steric effect of the phenyls in the etherphosphine ligands. In the crystal structure there is a number of RuCl...H 2 2 N contacts smaller than 3.0 Å at the same molecule, in - dicating the presence of unconventional intra-hydrogen bonds.