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Hexaphosphanylamine Ligands: 1,1,4,7,10,10‐Hexakis(diphenylphosphanyl)‐triethylenetetramine Complexes of Chromium, Molybdenum, and Tungsten
Author(s) -
MajoumoMbe Felicite,
Mendoza Lisbeth,
Lönnecke Peter,
GómezRuiz Santiago,
HeyHawkins Evamarie
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201500643
Subject(s) - triethylenetetramine , molybdenum , chemistry , ligand (biochemistry) , chromium , medicinal chemistry , tungsten , ring (chemistry) , chelation , crystal structure , norbornadiene , stereochemistry , crystallography , inorganic chemistry , organic chemistry , catalysis , biochemistry , receptor
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. Ligand 1 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 {(PPh 2 ) 2 N(CH 2 ) 2 NPPh 2 (CH 2 ) 2 NPPh 2 (CH 2 ) 2 N(PPh 2 ) 2 }‐κ 6 P 1 , P 2 , P 3 , P 4 , P 5 , P 6 ] [ M = Cr ( 2 ), Mo ( 3 ), W ( 4 )]. Compounds 1 – 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 of 2 and 3 show the formation of tris‐chelate complexes with two M –P–N–P four‐membered rings and one M –P–N–CH 2 –CH 2 –N–P seven‐membered ring.