Jump to main content
Jump to site search

Issue 48, 2013
Previous Article Next Article

Structural and electrochemical aspects of tris(ferrocenyl/phenyl-ethynyl)phosphine ligated chalcogen bridged iron carbonyl clusters

Author affiliations

Abstract

Room temperature stirring of THF solution of [Fe3Se2(CO)9] and P(C2R)3 (R = Ph, Fc), in presence of Me3NO·2H2O, yield monosubstituted [Fe3Se2(CO)8{P(C2R)3}] (1, R = Ph; 2, R = Fc) and disubstituted [Fe3Se2(CO)7{P(C2R)3}2] (3, R = Ph; 4, R = Fc) clusters. Under similar conditions, reactions of [Fe3Te2(CO)9] yield disubstituted [Fe3Te2(CO)7{P(C2R)3}2] (5, R = Ph; 6, R = Fc) and [Fe3Te2(CO)8{P(C2R)3}2] (7, R = Ph; 8, R = Fc), consisting of an adduct of Fe(CO)2{P(C2R)3}2 and Fe2Te2(CO)6 butterfly moieties. Further substitution of 2 with P(C2Ph)3 forms a mixed disubstituted cluster, [Fe3Se2(CO)7P(C2Fc)3P(C2Ph)3] (9). Crystal structures of disubstituted clusters 3–5 reveal a rare syn orientation of phosphinoalkyne ligands attached to the equatorial position of both basal irons, which is stabilised by an intramolecular CH⋯π interaction. DFT calculations also suggest that syn disubstituted products are thermodynamically most stable. Electrochemistry of tris(ferrocenylethynyl)phosphine containing clusters 2, 4, 8 and 9 has been studied by cyclic voltammetry, which shows cathodically shifted multielectron reversible oxidation of ferrocenyl groups.

Graphical abstract: Structural and electrochemical aspects of tris(ferrocenyl/phenyl-ethynyl)phosphine ligated chalcogen bridged iron carbonyl clusters

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 30 Aug 2013, accepted on 16 Oct 2013 and first published on 16 Oct 2013


Article type: Paper
DOI: 10.1039/C3RA44788J
Citation: RSC Adv., 2013,3, 26025-26034
  •   Request permissions

    Structural and electrochemical aspects of tris(ferrocenyl/phenyl-ethynyl)phosphine ligated chalcogen bridged iron carbonyl clusters

    P. Mathur, D. K. Rai, R. S. Ji, B. Pathak, S. Boodida and S. M. Mobin, RSC Adv., 2013, 3, 26025
    DOI: 10.1039/C3RA44788J

Search articles by author