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The First Observation and Structural Characterization of (Formamide)platinum(IV) Complexes
Author(s) -
Bokach Nadezhda A.,
Selivanov Stanislav I.,
Kukushkin Vadim Yu.,
Haukka Matti,
Guedes da Silva M. Fátima C.,
Pombeiro Armando J. L.
Publication year - 2001
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 - 10.1002/1099-0682(200111)2001:11<2805::aid-ejic2805>3.0.co;2-p
Subject(s) - chemistry , formamide , formamides , platinum , crystallography , nuclear magnetic resonance spectroscopy , stereochemistry , crystal structure , spectroscopy , catalysis , organic chemistry , physics , quantum mechanics
The reaction of trans ‐[PtCl 4 (EtCN) 2 ] and two equivalents of the formamides RR′NCHO (R/R′ = Me/Me, Me/H, t Bu/H) in CH 2 Cl 2 led to the formation of the compounds cis ‐[PtCl 4 {(O=)CHNRR′} 2 ], two of which (R/R′ = Me/H, t Bu/H) were characterized by X‐ray single‐crystal diffractometry, as well as by elemental analysis, FAB + ‐MS, and IR, 1 H, 13 C and 195 Pt NMR spectroscopy (including NOE, HMQC and INEPT experiments). The X‐ray structures and IR spectroscopic data indicate the coordination of the formamides through the O atom and significant contribution of the bipolar structure − O−C(H)= + NHR in the resonance hybrid of the ligands. The complexes cis ‐[PtCl 4 {(O=)CHNRR′} 2 ] represent the first example of (formamide)Pt IV species and also a rare case of platinum(IV) complexes with neutral O‐donor ligands.