Hexaphosphanylamine Ligands: 1, 1, 4, 7, 10, 10‐Hexakis(diphenylphosphanyl)‐triethylenetetramine Complexes of Chromium, Molybdenum, and Tungsten1. Issue 12 (7th October 2015)

• Record Type: Journal Article
• Authors: Majoumo‐Mbe, Felicite; Mendoza, Lisbeth; Lönnecke, Peter; Gómez‐Ruiz, Santiago; Hey‐Hawkins, Evamarie
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 641:Issue 12/13(2015)
• Page Start: 2306
• Page End: 2311
• Publication Date: 2015-10-07
• Subjects: P ligands -- Chromium -- Molybdenum -- Tungsten -- Chelates; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201500643
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract: The oligophosphanylamine ligand 1, 1, 4, 7, 10, 10‐hexakis(diphenylphosphanyl)triethylenetetramine (1 ) was obtained from the reaction of triethylenetetramine with six equivalents of chlorodiphenylphosphine in good yield. Ligand1 was treated with three equivalents of [Cr(CO)4 (MeCN)2 ], [Mo(CO)4 (nbd)] (nbd = norbornadiene), or [W(CO)4 (MeCN)2 ] in toluene to give the trinuclear tetracarbonyl ­complexes [{ M (CO)4 }3 {(PPh2 )2 N(CH2 )2 NPPh2 (CH2 )2 NPPh2 (CH2 )2 N(PPh2 )2 }‐κ 6 P 1, P 2, P 3, P 4, P 5, P 6 ] [ M = Cr (2 ), Mo (3 ), W (4 )]. Compounds1 –4 were fully characterized by NMR ( 1 H, 13 C, 31 P) and IR spectroscopy, elemental analysis and crystal structure determination (1 –3 ). The molecular structures of2 and3 show the formation of tris‐chelate complexes with two M –P–N–P four‐membered rings and one M –P–N–CH2 –CH2 –N–P seven‐membered ring. Abstract :