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Trans/cis isomerization of [RuCl<sub>2</sub>{H<sub>2</sub>C=C(CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub>)}(diamine)] complexes : Synthesis, spectral, crystal structure and DFT calculations and catalytic activity in the hydrogenation of α,β-unsaturated ketones

Trans/cis isomerization of [RuCl2{H2C=C(CH2PPh2)2)}(diamine)] complexes : Synthesis, spectral, crystal structure and DFT calculations and catalytic activity in the hydrogenation of α,β-unsaturated ketones

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WARAD, Ismail, Mousa AL-NOAIMI, Obadah S. ABDEL-RAHMAN, Firas F. AWWADI, Belkheir HAMMOUTI, Taibi B. HADDA, 2014. Trans/cis isomerization of [RuCl2{H2C=C(CH2PPh2)2)}(diamine)] complexes : Synthesis, spectral, crystal structure and DFT calculations and catalytic activity in the hydrogenation of α,β-unsaturated ketones. In: Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy. 117, pp. 250-258. ISSN 1386-1425. eISSN 1873-3557

@article{Warad2014Trans-30494, title={Trans/cis isomerization of [RuCl2{H2C=C(CH2PPh2)2)}(diamine)] complexes : Synthesis, spectral, crystal structure and DFT calculations and catalytic activity in the hydrogenation of α,β-unsaturated ketones}, year={2014}, doi={10.1016/j.saa.2013.08.030}, volume={117}, issn={1386-1425}, journal={Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy}, pages={250--258}, author={Warad, Ismail and Al-Noaimi, Mousa and Abdel-Rahman, Obadah S. and Awwadi, Firas F. and Hammouti, Belkheir and Hadda, Taibi B.} }

Warad, Ismail Al-Noaimi, Mousa Abdel-Rahman, Obadah S. eng 2015-03-23T15:55:01Z Abdel-Rahman, Obadah S. 2015-03-23T15:55:01Z Hammouti, Belkheir Al-Noaimi, Mousa Three complexes of the general formula trans/cis-[Ru<sup>(II)</sup>(dppme)(N-N)Cl<sub>2</sub>] {dppme is H<sub>2</sub>C=C(CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub> and N-N is 1,2-diaminocyclohexane (trans/cis-(1)) and 1-methyl-1,2-diaminopropane (trans-(2)} were obtained by reacting trans-[RuCl<sub>2</sub>(dppme)<sub>2</sub>] with an excess amount of corresponding diamine in CH<sub>2</sub>Cl<sub>2</sub> as a solvent. The complexes were characterized by an elemental analysis, IR, <sup>1</sup>H, <sup>13</sup>C and <sup>31</sup>P{1H} NMR, FAB-MS and UV–visible. The trans-(1) (kinetic product) readily isomerizes to the cis-(1) (thermodynamic product) and this process was followed by using <sup>31</sup>P{<sup>1</sup>H} NMR, cyclic voltammetry and UV–vis spectroscopy. The electrochemical studies on complex (1) reveal that the Ru(III)/Ru(II) couples are sensitive to the isomer (trans/cis) formed. The cis-(1) was confirmed by X-ray structure and <sup>31</sup>P{<sup>1</sup>H} NMR. Transfer-hydrogenation reactions for reduction of trans-4-phenyl-3-butene-2-one were conducted using complexes trans/cis-(1) and trans-(2). The electronic spectra of cis/trans-(1) in dichloromethane were calculated with the use of time-dependent DFT methods. 2014 Warad, Ismail Hadda, Taibi B. Awwadi, Firas F. Awwadi, Firas F. Hadda, Taibi B. Trans/cis isomerization of [RuCl<sub>2</sub>{H<sub>2</sub>C=C(CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub>)}(diamine)] complexes : Synthesis, spectral, crystal structure and DFT calculations and catalytic activity in the hydrogenation of α,β-unsaturated ketones Hammouti, Belkheir

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