682744-03-2Relevant academic research and scientific papers
Organometallic complexes derived from alkyne-functionalized imidazolium salts
Fei, Zhaofu,Zhao, Dongbin,Scopelliti, Rosario,Dyson, Paul J.
, p. 1622 - 1628 (2004)
Two 1,3-dialkyne-functionalized imidazolium chlorides, 1,3-dipropynylimidazolium chloride and 1,3-dipentynylimidazolium chloride, have been prepared from the direct reaction between the appropriate chloroalkyne and (trimethylsily)imidazole. Replacement of the chloride counterion with BF4- or BPh4- gave four further imidazolium salts, three of which melt below 100°C and one of which is a liquid at room temperature. Reactions of the BF4-1 and BPh4- salts with Co2(CO)8 afforded complexes in which both of the alkyne functionalities coordinated to a Co2(CO)6 unit. One of these organometallic derivatives, viz. 1,3-dipentynylimidazolium bis(hexacarbonyldicobalt) tetrafluoroborate, can be classified as an ionic liquid on the basis of its melting point. The solid-state structures of three of these new salts have been elucidated by single-crystal X-ray diffraction, revealing extensive networks of C?H?π and π?π interactions. Attempts to prepare carbene derivatives from the functionalized imidazolium salts have also been made.
