Diamines | An-Najah Staff

Synthesis, Identification and NMR of New Trans-dichloro-piperazine bis(ether-phosphine)ruthenium(II) Complex

Thu, 2014-06-12 21:57 — Ismail Warad

Year of Publication:

2013

Link:

http://revues.imist.ma/?journal=morjchem&page=article&op=view&path%5B%5D=1933

Preferred Abstract (Original):

Trans-dichloro-piperazine-bis(ether-phosphine)ruthenium(II) complex of general formula Cl₂Ru(h¹-Ph₂PCH₂CH₂OCH₃)₂(C₄H₁₀N₂) 2 was made available in good yield through treating equimolar amounts of Cl₂Ru(P^ÇO)₂ complex 1 with piperazine as co-ligand. The hemilability ring open reaction of ether-phosphine in complex 1 to prepare complex 2 was monitored by ³¹P-NMR. The structure of complex 2 was confirmed byelemental analysis, IR,³¹P-NMR ¹H-NMR,¹³C-NMR, FAB-MS and UV-visible spectroscopy.

Phosphorus-31 Nmr and Fab-Mass Spectroscopes to Confirm Synthesis of Diamine(Diphosphine)Ruthenium(Ii) Complexes Starting from Diamine(Ether Phosphine)Ruthenium(Ii) Complexes via Phosphine Ligands Exchanged

Mon, 2013-04-15 17:09 — Ismail Warad

Journal Title, Volume, Page:

Journal of Saudi Chemical Society, 01/2006; 10:285-294. pp.285-294

Year of Publication:

2006

Link:

http://www.researchgate.net/publication/233794518_PHOSPHORUS-31_NMR_AND_FAB-MASS...

Authors:

Ismail Warad

Department of Chemistry, Girls College at Hawtat Sudayr, Saudi Arabia

Current Affiliation:

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

Saud I Al-Resayes

Department of Chemistry, College of Science King Saud University, P.O. Box 2455, Riyadh-11451, Saudi Arabia

Preferred Abstract (Original):

The ligands exchange of the ether-phosphine (Ph2PCH2CH2OCH3) on the diamine(ether-phosphine)ruthenium(II) with 1,3-bis(diphenylphosphino)propane as a bidentate chelate ligand successfully occurs to produce diamine[1,3-bis(diphenylphosphino)propane]ruthenium(II) complexes in a good yields under vigorous stirring for one week in an inert atmosphere using dichloromethane as solvent. Several ether-phosphine-RuC12 complexes with different types of diamine have been tested to confirm the substitution method. In order to collect more information about the system 31P{1H} NMR and 13C{1H} NMR as well as FAB- Mass spectroscopy have been investigated in parallel way to control and support the ligands exchange reaction processes.

Synthesis, Spectral, Thermal, X-Ray Single Crystal of New Rucl2(Dppb)Diamine Complexes and Their Application in Hydrogenation of Cinnamic Aldehyde

Wed, 2013-03-13 16:57 — Ismail Warad

Journal Title, Volume, Page:

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Volume 95, September 2012, Pages 374–381

Year of Publication:

2012

Link:

http://www.sciencedirect.com/science/article/pii/S1386142512003435

Authors:

Ismail Warad

Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

Current Affiliation:

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

Hanan Al-Hussain

Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

Rawhi Al-Far

Department of Applied Sciences, Faculty of Applied Sciences and I.T., Al-Balqa’ Applied University, Salt 19117, Jordan

Refaat Mahfouz

Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

Belkheir Hammouti

LCAE-URAC18, Faculté des Sciences, Université Mohammed Ier, B.P. 717, Oujda 60000, Morocco

Taibi Ben Hadda

Laboratoire de Chimie Matériaux, FSO, Université Mohammed Ier, Oujda 60000, Morocco

Preferred Abstract (Original):

The preparation of new three trans-[RuCl2(dppb)(N–N)] with mixed diamine (N–N) and 1,4-bis-(diphenylphosphino)butane (dppb) ligands, starting from RuCl2(PPh3)3 as precursor is presented. The complexes are characterized on the basis of elemental analysis, IR, 1H, 13C and 31P{1H}NMR, FAB-MS, TG/DTA and single crystal X-ray diffraction studies. Complex (2L1) crystallizes in the monoclinic unit cells with the space group P21. The catalysts are evaluated for their Cinnamic aldehyde hydrogenation. The catalysts show excellent activity and selectivity for the unsaturated carbonyl compound under mild conditions.