Carbon-13 n.m.r. spin-lattice relaxation times of the anion [Re3(μ-H)4(CO)10]- have been determined at various temperatures and field strengths in order to elucidate the different components of the relaxation mechanism. Scalar coupling with the quadrupolar Re isotopes (185Re, 187Re; I = 52) proved to be the main relaxation pathway at room temperature in the range 20-68 MHz. Analysis of the data allowed the estimation of the quadrupolar relaxation time of Re and of the coupling constant 1J(187Re-C). The latter has been determined for the first time.
C-13 NUCLEAR MAGNETIC-RESONANCE EVIDENCE OF A RELAXATION PROCESS DOMINATED BY SCALAR COUPLING WITH A QUADRUPOLAR NUCLEUS IN {[RE3(MU-H)4(CO)10]-} / T. BERINGHELLI, H. MOLINARI, A. PASTORE. - In: JOURNAL OF THE CHEMICAL SOCIETY DALTON TRANSACTIONS. - ISSN 0300-9246. - 9(1985), pp. 1899-1901. [10.1039/dt9850001899]
C-13 NUCLEAR MAGNETIC-RESONANCE EVIDENCE OF A RELAXATION PROCESS DOMINATED BY SCALAR COUPLING WITH A QUADRUPOLAR NUCLEUS IN {[RE3(MU-H)4(CO)10]-}
T. BeringhelliPrimo
;
1985
Abstract
Carbon-13 n.m.r. spin-lattice relaxation times of the anion [Re3(μ-H)4(CO)10]- have been determined at various temperatures and field strengths in order to elucidate the different components of the relaxation mechanism. Scalar coupling with the quadrupolar Re isotopes (185Re, 187Re; I = 52) proved to be the main relaxation pathway at room temperature in the range 20-68 MHz. Analysis of the data allowed the estimation of the quadrupolar relaxation time of Re and of the coupling constant 1J(187Re-C). The latter has been determined for the first time.
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