title: Dual nucleophilic substitution at a W(ii) η(2)-coordinated diiodo acetylene leading to an amidinium carbyne complex.
abstract: The synthesis and reactivity of a W(ii) C2I2 complex towards various nucleophiles are described. Soft, aprotic nucleophiles like 4-dimethylaminopyridine (DMAP) lead to substitution of one CO at tungsten, whereas reaction with an excess of benzylamine results in a dual nucleophilic substitution at the alkyne moiety involving the rearrangement to a novel cationic amidinium carbyne complex.
authors.affiliation: Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany. wolfram.seidel@uni-rostock.de.
authors.forename: Kai
authors.initials: K
authors.lastname: Helmdach
authors.forename: Julia
authors.initials: J
authors.lastname: Rüger
authors.forename: Alexander
authors.initials: A
authors.lastname: Villinger
authors.forename: Wolfram W
authors.initials: WW
authors.lastname: Seidel