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Bipyridine Adducts of Molybdenum Imido Alkylidene and Imido Alkylidyne Complexes.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ng, Victor Wee Lin Müller, Peter Schrock, Richard R. Malcolmson, Steven J. Meek, Simon J. Hoveyda, Amir H. |
| Copyright Year | 2012 |
| Abstract | Seven bipyridine adducts of molybdenum imido alkylidene bispyrrolide complexes of the type Mo(NR)(CHCMe(2)R')(Pyr)(2)(bipy) (1a-1g; R = 2,6-i-Pr(2)C(6)H(3) (Ar), adamantyl (Ad), 2,6-Me(2)C(6)H(3) (Ar'), 2-i-PrC(6)H(4) (Ar(iPr)), 2-ClC(6)H(4) (Ar(Cl)), 2-t-BuC(6)H(4) (Ar(t) (Bu)), and 2-MesitylC(6)H(4) (Ar(M)), respectively; R' = Me, Ph) have been prepared using three different methods. Up to three isomers of the adducts are observed that are proposed to be the trans and two possible cis pyrrolide isomers of syn alkylidenes. Sonication of a mixture containing 1a-1g, HMTOH (2,6-dimesitylphenol), and ZnCl(2)(dioxane) led to the formation of MAP species of the type Mo(NR)(CHCMe(2)R')(Pyr)(OHMT) (3a-3g). DCMNBD (2,3-dicarbomethoxynorbornadiene) is polymerized employing 3a-3g as initiators to yield >98% cis,syndiotactic poly(DCMNBD). Attempts to prepare bipy adducts of bisdimethylpyrrolide complexes led to formation of imido alkylidyne complexes of the type Mo(NR)(CCMe(2)R')(Me(2)Pyr)(bipy) (Me(2)Pyr = 2,5-dimethylpyrrolide; 4a - 4g) through a ligand-induced migration of an alkylidene α proton to a dimethylpyrrolide ligand. X-ray structures of Mo(NAr)(CHCMe(2)Ph)(Pyr)(2)(bipy) (1a), Mo(NAr(iPr))(CHCMe(2)Ph)(Pyr)(OHMT) (3d), Mo(NAr)(CCMe(2)Ph)(Me(2)Pyr)(bipy) (4a), and Mo(NAr(T))(CCMe(3))(Me(2)Pyr)(bipy) (Ar(T) = 2-(2,4,6-i-Pr(3)C(6)H(2))C(6)H(4); 4g) showed structures with the normal bond lengths and angles. |
| Starting Page | 4558 |
| Ending Page | 4564 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://dspace.mit.edu/openaccess-disseminate/1721.1/82560 |
| Alternate Webpage(s) | http://web.mit.edu/pmueller/www/own_papers/lichtscheidl_etal_2012.pdf |
| PubMed reference number | 22899875v1 |
| Volume Number | 31 |
| Issue Number | 12 |
| Journal | Organometallics |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | 1-acylglycerol-3-phosphate O-acyltransferase Adenylyl Imidodiphosphate Carcinoma in Situ Isomerism Ligands Maxillary right second premolar abutment Molybdenum Protons Sonication adduct bipyridine negative regulation of iron-sulfur-molybdenum cofactor assembly polybutadiene, syndiotactic |
| Content Type | Text |
| Resource Type | Article |
