Generation of [Tp∗Rh(η4-1,3-COD)] (Tp∗ = hydridotris(3,5-dimethyl)pyrazolylborate, 1,3-COD = cyclooctadiene) and its potential in CH bond activation

✍ Scribed by Rita Boaretto; Gino Paolucci; Silvana Sostero; Orazio Traverso

• Book ID: 104422498
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 87 KB
• Volume: 204-205
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(03)00306-6

✦ Synopsis

Photolysis of [Tp * Rh( 4 -1,5-COD)] 1 (Tp * = hydridotris(3,5-dimethylpyrazolyl)borate, 1,5-COD = cyclooctadiene) in benzene at 400 nm gives a quantitative yield of the new compound [Tp * Rh( 4 -1,3-COD)] 2. Selected photolysis of 2 at 336 nm can be used to produce (a) hydrido-phenyl-phosphite [Tp * Rh(H)(C 6 H 5 )P(OMe) 3 ], (b) hydrido-carbonyl [Tp * Rh(H) 2 (CO)], (c) chelate [Tp * Rh(C 6 H 5 )(CH 2 CH 2 COO t Bu] when the photoreactions were made in the presence of P(OMe) 3 , CH 3 OH and t Bu-acrylate, respectively. These results are interpreted in terms of oxidative addition reactions by the reactive intermediates photogenerated in the Rh system 2.