Dual nucleophilic substitution at a W(ii) η2-coordinated diiodo acetylene leading to an amidinium carbyne complex. Issue 12 (11th January 2016)

• Record Type: Journal Article
• Authors: Helmdach, Kai; Rüger, Julia; Villinger, Alexander; Seidel, Wolfram W.
• Is Part Of: Chemical communications. Volume 52:Issue 12(2016)
• Page Start: 2616
• Page End: 2619
• Publication Date: 2016-01-11
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c5cc10397e
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The reactivity of side-on coordinated diiodo acetylene at the [Tp′W(CO)2 ] + complex building block towards various nucleophiles is described. Introduction of two primary amines involved a side-on to end-on rearrangement, which is rather unexpected for 4e donor alkyne complexes. Abstract : The synthesis and reactivity of a W(ii ) C2 I2 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.