A Two-Coordinate Cobalt(II) Imido Complex with NHC Ligation: Synthesis, Structure, and Reactivity
Jingzhen Du
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/
Search for more papers by this authorLinbo Wang
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/
Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, 241000 (P.R. China)
Search for more papers by this authorProf. Dr. Meihua Xie
Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, 241000 (P.R. China)
Search for more papers by this authorCorresponding Author
Prof. Dr. Liang Deng
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/Search for more papers by this authorJingzhen Du
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/
Search for more papers by this authorLinbo Wang
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/
Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, 241000 (P.R. China)
Search for more papers by this authorProf. Dr. Meihua Xie
Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, 241000 (P.R. China)
Search for more papers by this authorCorresponding Author
Prof. Dr. Liang Deng
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 (P.R. China) http://dengliang.sioc.ac.cn/Search for more papers by this authorAbstract
The synthesis, structural characterization, and reactivity of the first two-coordinate cobalt complex featuring a metal–element multiple bond [(IPr)Co(NDmp)] (4; IPr=1,3-bis(2′,6′-diisopropylphenyl)imidazole-2-ylidene; Dmp=2,6-dimesitylphenyl) is reported. Complex 4 was prepared from the reaction of [(IPr)Co(η2-vtms)2] (vtms=vinyltrimethylsilane) with DmpN3. An X-ray diffraction study revealed its linear CCoN core and a short CoN distance (1.691(6) Å). Spectroscopic characterization and calculation studies indicated the high-spin nature of 4 and the multiple-bond character of the CoN bond. Complex 4 effected group-transfer reactions to CO and ethylene to form isocyanide and imine, respectively. It also facilitated EH (E=C, Si) σ-bond activation of terminal alkyne and hydrosilanes to produce the corresponding cobalt(II) alkynyl and cobalt(II) hydride complexes as 1,2-addition products.
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