๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

High-pressure NMR study of dynamical solvent effects on the conformational isomerization of 1,1-difluorocyclohexane

โœ Scribed by J. Ashcroft; M. Besnard; V. Aquada; J. Jonas


Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
394 KB
Volume
110
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

โœฆ Synopsis


The trims oi tcmpcrn~ure md prcssurc on rile coniurnmionlri isomerizahn of l.l~i!luoroc~clohcsanc in soluCon IKIW bccu studied using 191: FT NMl< spsctroscopy.

The prcssurc dcpcndcncc of the isomerizaIion of l,l-difluorocyclo-I~exmc in xctoncdb and mcIi~ylc~clohcsanc compared ICI rhe pressure depcndcncc of 111e isomerizarion of cyclohesanc in the sdmc soivcnrs indicates the prcscnce of diclccuic friction cffecrs for l.liiifluoroc~cio!lcsa~~c in a polar solvcnr.


๐Ÿ“œ SIMILAR VOLUMES


High-temperature high-pressure 1H-NMR st
โœ S. Shimokawa; E. Yamada; T. Yokono; J. Yamada; Y. Sanada; M. Inagaki ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 182 KB

Carbon spherules, nuclear magnetic resonance (NMR), coal tar pitch, PVC pitch. Carbonization under pressure modifies the reaction process so as to give a high carbon yield and also to form a structure in the resultant solid carbon which is different from that formed under normal pressures. Marsh er

High-temperature and high-pressure 1H NM
โœ S. Shimokawa; E. Yamada; T. Yokono; S. Iyama; Y. Sanada ๐Ÿ“‚ Article ๐Ÿ“… 1984 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 321 KB

An autoclave-type 'H NMR probe has been developed to monitor the carbonization process of such carbonaceous materials as coal and pitch under high pressures up to 10 MPa. In the early stages of the carbonization of pitch, the change in hydrogen aromaticity, fHe, was found to be dependent on the appl

1H NMR structural analysis of isomeric t
โœ Christopher J. L. Silwood; David B. Davies ๐Ÿ“‚ Article ๐Ÿ“… 1991 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 661 KB

The structures of two pairs of tetrazole-substituted spirostan steroids were characterized by the use of one-and twadimensional 'H NMR measurements. The conformation of the seven-membered spirostan ring A of the steroid was determined by analysis of proton spin coupling Constants and confirmed by 1D

An NMR study of the conformational equil
โœ L. D. Hall; R. N. Johnson ๐Ÿ“‚ Article ๐Ÿ“… 1972 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 490 KB

The 'H and IBF NMR parameters of 5-fluoro-1,3-dioxan (1) dissolved in a number of solvent systems are interpreted on the basis of fast inversion between two chair conformations. In cyclohexane solution the two chair conformations are almost equally populated, whereas in more polar solvents, such as

Effects of the Bead-Solvent Interaction
โœ Alexander Uvarov; Stephan Fritzsche ๐Ÿ“‚ Article ๐Ÿ“… 2004 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 257 KB

## Abstract **Summary:** Hamiltonian dynamics and a chain model are used to study the dynamics of macromolecules immersed in a solution. From the Hamiltonian of the overall system, โ€œmacromoleculeโ€‰+โ€‰solvent,โ€ a master and a Fokkerโ€Planck equation are then derived for the phaseโ€space distribution of

Carbon-13 NMR studies of 1-aryl-3-phenyl
โœ Lawrence D. Colebrook; Mohammad A. Khadim ๐Ÿ“‚ Article ๐Ÿ“… 1982 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 401 KB

## Abstract Characteristic ^13C^ chemical shift ranges and substituent shifts of heterocyclic ring carbon atoms have been identified for a number of 1โ€arylโ€3โ€phenylโ€2โ€thioxoโ€4โ€imidazolidinones. ^13^CNMR spectra may be used to detect slow internal rotation about the aryl C๏ฃฟNโ€1 bond in compounds with