The reactions with iron carbene catalysis

N-heterocyclic carbenes (NHCs) that make up an important class of ligand (NHC) the organometallic chemistry show better catalytic activity and selectivity from phosphine ligands. The complexes are formed N-heterocyclic carbene with transition metals occupy an important place the homogeneous catalysis. These catalytic systems, although transition metals are too large to benefit some transition metals have very expensive and often toxic features. If iron is interesting alternative other metals the catalysis due to low cost, abundance and low toxicity characteristics. Over the last decade the use of iron as a catalyst in an efficient significantly gained importance and effective results were obtained. Efforts in this area have not led to a broad application area only iron catalysts in organic chemistry, but also contributed to the rapid development of the chemistry of organo-iron. In recent times iron-NHC complexes have gained great interest, due to cheap, eco-friendly and effective as catalyst precursors the properties. Therefore, in the present study, imidazolidinium NHC precursor salts were synthesized and their iron complexes were prepared. The studies summarized in main sections: 1) 1,3-Disubstituted imidazolidinium salts (1a-1o) were prepared from the interaction with different alkyl halides of N-substituted imidazoline compounds. Although some of these compounds previously synthesized by our group, some of these new synthesized. The structure of newly synthesized compounds (1a-1f, 1ö) were elucidated by suitable spectroscopic methods. 2) NHCs obtained by the interaction with the base of imidazolidinium salts were reacted with Fe(CO)2CpI complex. The structures of piano-stool Fe-NHC complexes (2a-2l) were elucidated by suitable spectroscopic methods The imidazolidinium ferrat complexes yet not found the literature were obtained by reacting FeBr2 and Fe (OAc)2 complexes with imidazolidinium salts. The structures of their were elucidated by the X-ray method. 3) The catalytic activities that the reduction reaction of the carbonyl groups of the synthesized iron complexes were determined. KEYWORDS: N-heterocyclic carbene, iron, piano-stool iron complex, ferrate complexes, hydrosilation reaction, Hydrogen transfer reaction.