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Synthesis and Structure of the First Carbyne Complex Functionalized Zwitterionic α‐Carbenium Phosphinates [Tp′(CO) 2 M ≡ C−P(O) 2 −C(NR 2 ) 2 ] (M = Mo, W; R = Me, Et)
Author(s) -
Weber Lothar,
Dembeck Gottfried,
Stammler HansGeorg,
Neumann Beate
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199805)1998:5<579::aid-ejic579>3.0.co;2-e
Subject(s) - carbyne , chemistry , phosphinate , moiety , crystal structure , stereochemistry , nuclear magnetic resonance spectroscopy , heteronuclear molecule , crystallography , medicinal chemistry , organic chemistry , catalysis , carbene , fire retardant
Oxidation of the phosphaalkenyl‐substituted carbyne complexes [Tp′(CO) 2 M≡C−P=C(NR 2 ) 2 ] ( 1a : M = Mo, R = Me; 1b : M = W, R = Me; 2a : M = Mo, R = Et; 2b : M = W, R = Et) with molecular dioxygen cleanly affords the orange carbyne complexes [Tp′(CO) 2 M≡C−P(O) 2 C(NR 2 ) 2 ] [ 3a : M = Mo, R = Me; 3b : M = W; R = Me; 4a : M = Mo, R = Et; 4b : M = W, R = Et; Tp′ = HB(3,5‐Me 2 HC 3 N 2 ) 3 ], which are functionalized at the methylidyne carbon atom by an α‐carbenium phosphinate moiety. The novel compounds have been characterized by IR, 1 H‐, 13 C‐, and 31 P‐NMR spectroscopy. In addition, the molecular structure of 4a has been determined by a single‐crystal X‐ray structure analysis.