Carbon-13 nuclear magnetic resonance studies. 35. Carbon-13 nuclear magnetic resonance studies of organometallic compounds. I. trans-Methylplatinum(II) derivatives

13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. V. Di- and Trimethylplatinum(IV) Derivatives

“…ic resonance spectroscopy has provided important new information concerning the nature of the bonding in simple o-bonded platinum(I1) derivatives (1)(2)(3)(4). From studies of three series of \ * -trans-methylplatinum(I1) complexes (2), we presented evidence which firmly supports the rehy-where L and L' are neutral ligands and R alld X bridization theory of the trans-influence (5)(6)(7).…”

“…In all cases, the high field resonances in the spectra were assigned to the carbons of the platinum-methyl groups of 1-13, on the basis of their similarity with a host of related methylplatinum(I1) derivatives (1,2,4). The central platinum-methyl resonances are flanked by widely spaced Ig5pt satellites of ca.…”

“…On a first-order basis one would anticipate two small, equivalent coupling constants (ca. 6 Hz) (2,14) for the coupling of the 13C nucleus with the two cis 3 1~ nuclei, and one large 13C-31P coupling constant (ca. 105 Hz) (2,14) for the 13C coupling with the t r a n~-~' P nucleus.…”

“…observed for series of re-creases by 30 Hz, fro111 545($2) to 51 5(*2) Hz. lated trans-methylplatinum(I1) derivatives (2).…”

13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. IX. Phenylaminocarbene Derivatives

“…shieldings and coupling constants obtained from the spectra of 2-6 are summarized in Tables 2 and 3, respectively. The assignments of the carbon resonances of the platinum-methyl, arsenic-methyl, carbene-methyl and carbene carbons were carried out by comparisons with related derivatives (1,9). However, the assignments of all the aromatic carbons were not so straightforward.…”