Synthesis And Spectroscopic Studies On Some Ruthenium(II) Complexes

Abstract

The salt [RuCl2(CO)2ln has proved very useful precursor for the syntheses of a variety of organometallic complexes of transition metals. The compounds of dichlorodicarbonylruthenium(II) of the formula [RuCl2(CO)22L] or [RuCl2(CO)2L'J where L= monodentate ligands such as tetramethylthiourea or substituted ureas, naphthisoxazole, 2-aminobenzthiazole or thioacetamide and L' = bidentate ligands such as 1,2-diaminoethane, 2,2'-dipyridylamine, 1-acetylferrocenethiosemicarbazone (1-AFTSC) or 1-acetylferrocenesemicarbazone (1-AFSC) have been prepared. The versatile nature of these ligands (L or L) has shown that they react readily with [RuCl2(CO)2ln giving very stable Ru(II) complexes. For example, the complex 1-acetylferrocenethiosemicarbazone, 7i-C5H5FeC5H4.CH3C=N.NH.CS.NH2. (1-AFTSC) or 1-acetylferrocenesemicarbazone, 7i-C5H5FeC5H4CH3C=N. NH.CO.NH2- (1-AFSC) acts as bidentate ligand in which thiosemicarbazone or semicarbazone moiety acts as bridge between two metal systems giving bimetallic complexes. Thus, the reaction of [RuCl2(CO)2]n with 1-AFTSC or 1-AFSC yields 1-acetylferrocenethiosemicarbazone dichlorodicarbonylruthenium (II) [7C-C5H5FeC5H4CH3C=N. NH.CS.NH2RuCl2(CO)2] or 1-acetylferrocenesemicarbazone dichlorodicarbonylruthenium(H) [7C-C5H5FeC5H4CH3C=N.NH.CO.NH2.RuCl2(CO)2] complexes respectively as shown in the scheme of reactions (Fig. 1). Similarly reactions of CuX2(X = Cl or Br) and NiCl2.XH2O with 1-AFTSC yield respective organometallic complexes. All the complexes were identified by elemental analysis and were characterized by IR treated with [RuCl2(CO)2]n[8]. However, 1-acetylferrocenethiosemicarbazone, (7C-C5H5FeC5H4CH3 C=N.NH.CS.NH2) has proved very useful bidentate ligand. and ^H-NMR spectroscopy and elemental analyses.

إستخدم متراكب ثنافي الكلوريد ثلْافي الكربونيل للروثنيوم الثنائي كمادة أولية لتحضير متراكبات الروثنيوم الثنائي مع مرتبطات إِحادية المخلب المتعادلة وكدْلك مع المرتبطات ثنائية المخلب مثل اثيلين ثنافي الأمين ومشتقات الفروسين ثيوسيمكربازوق ه ولقد تم التعرف على تلك المتراكبات باستخدام طيف الأشعة تحت الحمراء والرنين النووي المغناطيسي للبروتون وكذلك التحليل العنصسي .