754227-16-2Relevant academic research and scientific papers
Selective reaction of aminorhenium complexes and the formation of Cp-N-P tridentate complexes
Wang, Tein-Fu,Wang, Tan-Ching,Wen, Yuh-Sheng
, p. 1668 - 1674 (2004)
Rhenium complexes containing cyclopentadienyl-aminophosphanyl tridentate ligands have been prepared starting from a cyclopentadienyl-amino bidentate complex in a controlled manner. Dehydrobromination of [η5: η1-C5H4CH2CH 2NH(CH3)Re(CO)2Br]+ (2) was carried out selectively at low temperature to give an exocyclic iminorhenium complex [η5:η1-C5H4CH 2CH2N(=CH2)Re(CO)2]. (5). Selective N-methylation provided a cationic heterocyclopropane complex 8 which reacted with various nucleophiles (tBuNH2, NaOCH3, KPPh 2) to give precursors for tridentate complexes. A formal oxidation of the carbonyl ligand to a labile carbon dioxide ligand was accomplished by oxidation with peroxy acid. Intramolecular N ligand displacement furnished the Cp-N-P tridentate complex. The relative stability of the N, P and CO ligands was revealed when an η3-allyl ligand was formed. The N ligand became detached from the metal rather than the P or CO ligands as the η1-allyl was transformed to the corresponding η3-allyl coordination mode. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
