Formation of carbonylrhenium cryptates with alkali metal cations: Coordination chemistry studies of [Ph2P(E)NP(E)Ph2]−, E=O, S, Se towards ReBr(CO)5

Abstract

Reaction of ReBr(CO) 5 with Li[Ph 2 P(O)NP(O)Ph 2 ] afforded the cryptate Li[Re 2 (CO) 6 {μ-Ph 2 P(O)NP(O)Ph 2 -κ 2 O,O′ } 3 ]; whereas K[Ph 2 P(O)NP(O)Ph 2 ] reacted with ReBr(CO) 5 to give K[Re 2 (CO) 6 {μ-Ph 2 P(O)NP(O)Ph 2 -κ 2 O,O′ }{Ph 2 P(O)NP(O)Ph 2 -κ 2 O,O′ } 2 ]. Other chalcogen ligands’ salts M[Ph 2 P(E)NP(E)Ph 2 ], E = Se and S, M = K and Li gave dirhenium carbonyls with bromido and Ph 2 P(E)NP(E)Ph 2 , E = Se or S bridges upon reaction with ReBr(CO) 5 . Reaction of ReBr(CO) 5 with Li[Ph 2 P(O)NP(O)Ph 2 ] afforded the cryptate Li[Re 2 (CO) 6 {μ-Ph 2 P(O)NP(O)Ph 2 -κ 2 O,O’ } 3 ]; whereas K[Ph 2 P(O)NP(O)Ph 2 ] reacted with ReBr(CO) 5 to give K[Re 2 (CO) 6 {μ-Ph 2 P(O)NP(O)Ph 2 -κ 2 O,O′ }{Ph 2 P(O)NP(O)Ph 2 -κ 2 O,O′ } 2 ]. Other chalcogen ligands’ salts M[Ph 2 P(E)NP(E)Ph 2 ], E = Se and S, M = K and Li gave dirhenium carbonyls with bromido and Ph 2 P(E)NP(E)Ph 2 , E = Se or S bridges upon reaction with ReBr(CO) 5 .