The insertion of 1-phenyl-1-propyne into the ruthenaborane cluster HRu4(CO)12BH2 and the isolation and molecular structure of 1-phenyl-2,3-dimethylazulene

Article abstract of DOI:10.1016/0022-328X(91)83016-W

Photolysis of the tetraruthenaborane butterfly cluster HRu4(CO)12BH2 with 1-phenyl-1-propyne yields the cluster product HRu4(CO)12B(H)C(Ph)CMeH.Interestingly, 1-phenyl-2,3-dimethylazulene has also been isolated from the reaction mixture.The formation of this substituted azulene is an example of a novel cyclodimerisation of the alkyne.The crystal structure of 1-phenyl-2,3-dimethylazulene has been determined.