Complexes of TaOCl3 and TaSCl3 with neutral N- and O-donor ligands – Synthesis, properties and comparison with the niobium analogues. (15th July 2019)

• Record Type: Journal Article
• Authors: Bannister, Robert D.; Levason, William; Light, Mark E.; Reid, Gillian; Zhang, Wenjian
• Is Part Of: Polyhedron. Volume 167(2019)
• Page Start: 1
• Page End: 10
• Publication Date: 2019-07-15
• Subjects: Tantalum oxide trichloride -- Tantalum sulfide trichloride -- Phosphine oxide -- 2, 2′-Bipyridyl -- 1, 10-Phenanthroline; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2019.03.055
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: The synthesis of complexes of TaOCl3 and TaSCl3 with pyridyl and phosphine oxide ligands are reported and spectroscopic and structural data compared. Abstract: The white complexes, [TaOCl3 (OPPh3 )2 ], [TaOCl3 (L-L)] (L-L = 1, 10-phenanthroline, 2, 2′-bipyridyl, Ph2 P(O)CH2 P(O)Ph2, Ph2 P(O)CH2 CH2 P(O)Ph2 and o -C6 H4 (P(O)Ph2 )2 ), have been prepared from TaCl5, O(SiMe3 )2 and the ligands in anhydrous CH2 Cl2 solution. The corresponding yellow [TaSCl3 (OPPh3 )2 ] and [TaSCl3 (L-L)] were made similarly using S(SiMe3 )2 . The complexes have been characterised by microanalysis, IR and NMR ( 1 H, 31 P{ 1 H}) spectroscopy. X-ray crystal structures have been obtained for [TaOCl3 (1, 10-phen)], [TaSCl3 (1, 10-phen)], [TaOCl3 { o -C6 H4 (P(O)Ph2 )2 }], [TaSCl3 (OPPh3 )2 ], [TaSCl3 {Ph2 P(O)CH2 CH2 P(O)Ph2 }] and [TaSCl3 (MeCN)2 ], which all contain mer -chlorines and with the neutral ligands trans to O/Cl or S/Cl. The structure of the Ta(V) dimer [Cl2 S(1, 10-phen)Ta(µ-O)Ta(1, 10-phen)SCl2 ], formed by trace hydrolysis, is also reported. Comparisons between the complexes of TaOCl3 and TaSCl3 and their niobium analogues are discussed.