Ammonia and carbon dioxide from urea. A multinuclear NMR study of the activation of urea by platinum(II)

Watson A.A. and Fairlie D.P. (1995) Ammonia and carbon dioxide from urea. A multinuclear NMR study of the activation of urea by platinum(II). Inorganic Chemistry, 34 11: 3087-3092. doi:10.1021/ic00115a041


Author Watson A.A.
Fairlie D.P.
Title Ammonia and carbon dioxide from urea. A multinuclear NMR study of the activation of urea by platinum(II)
Journal name Inorganic Chemistry   Check publisher's open access policy
ISSN 0020-1669
Publication date 1995-01-01
Sub-type Article (original research)
DOI 10.1021/ic00115a041
Volume 34
Issue 11
Start page 3087
End page 3092
Total pages 6
Subject 1604 Human Geography
Abstract Isotopically enriched (98% 15N, 99% 13C) urea, 15NH2 13CO15NH2, reacts with [dienPtOH2]2+ in acetone to form principally 13CO2, 15NH4 + and [dienPt15NH3]2+. The reaction was monitored by combined one- and two-dimensional multinuclear (1H, 13C, 15N) NMR spectroscopy. The initial product was [dienPt0C(NH2)2]2+, in addition to a fluxional species detected spectroscopically at low temperature, which undergoes O- to N-linkage isomerization to [dienPtNH2CONH2]2+. The latter complex, unlike the crystallographically characterized [dienPtNH2CONMe2]2+, decomposes to CO2, NH4 +, and [dienPtNH3]2+. [dienPtNCO]2+ was detected as an intermediate by 13C NMR spectra and may be formed directly from [dienPtNH2CONH2]2+ or its tautomer [dienPtNH=C(OH) NH2]2+ by elimination of ammonia or indirectly after hydrolysis to [dienPtNH2CO2]+ through elimination of water. Addition of acid and water to acetone solutions of [dienPtNCO]2+ rapidly produces [dienPtNH3]2+ and CO2. The mechanism of the reaction is discussed.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
 
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