Solid-state P-31 and C-13 CP/MAS results of several diphosphines are compared with solution phase data. Non-equivalence of the P atoms are observed in the solid state for the less flexible derivatives (including all chiral diphosphines studied), whereas the more flexible compounds with a ...
摘要: The first examples of symmetrically bridging μ-perpendicular phosphaalkyne complexes are reported. Their structures have been established by solution and solid state 31P{1H} NMR spectroscopy.关键词:Phosphorus Rhodium Alkyne Nuclear magnetic resonance ...
Here the authors use solid-state NMR in concert with solution NMR and X-ray crystallography to probe the transmembrane signaling mechanism of CitA, a paradigmatic citrate sensing membrane embedded histidine kinase. Xizhou Cecily Zhang Kai Xue
Structure and NMR Spectroscopy in Solid State and Solution of {Na2[μ2-(C6H4O2)2](C6H4OOH)2}4 doi:10.1002/cjoc.200690064Chinese Journal of ChemistryLu, Xiao-MingLi, LiSong, Fu-GenWang, BoYuan, Hua-ZhenYe, Chao-Hui
Solution-state 13C and 1H nuclear magnetic resonance (NMR) spectroscopy (including nuclear overhauser effect studies); density functional theory quantum mechanical conformational modeling (and resultant calculations of 13C shielding constants and JHH spin–spin coupling constants) were combined with solid-...
The P CP/MAS NMR spectra from powder samples and the P and Co solution NMR spectra of [RCo(DH) PPh ] (R=Me, n-Pr, CH Ph, CH Cl, CH CF , Ph, i-Pr) are reported. Due to coupling to Co ( I=7/2), the P CP/MAS spectra exhibit, except for R= i-Pr, distorted octets ...
Brouwer DH, Darton RJ, Morris RE, Levitt MH. A solid-state NMR method for so- lution of zeolite crystal structures. J Am Chem Soc 2005;127:10365.Darren H.Brouwer,,Richard J.Darton,,Russell E.Morris,,Malcolm H.Levitt.A Solid-State NMR Method for Solution of Zeolite CrystalStructures. ...
One- and two-dimensional-solution NMR is discussed for lignin structure characterization, while solid-state cross-polarization/magic angle spinning (CP/MAS) 13C NMR is focused on analysis of the crystallinity and ultrastructure of cellulose. The solution and solid-state NMR techniques presented in ...
The comparison of solid state and solution 13C NMR spectra of the model compound trans, trans-2,5-dimethyl-1,4-bis(2-(3,4,5-trimethoxyphenyl)ethenyl) benzene showed that essentially the same conformation exists in both states. The molecule is almost planar exhibiting an ortho-methyl-syn for...
(1991), ChemInform Abstract: Molecular Structure in the Solid State (X-Ray Crystallography) and in Solution (1H and 13C NMR Spectroscopy) of 1,3-Diazetidines and Pentasubstituted Biguanides. X-Ray Molecular Structure of 2,4-Bis-(6- methyl-3-methylthio-5-oxo-4,5-dihydro-1,2,4-triazin...