✦ LIBER ✦

X-Ray and stereochemical studies on xylan diacetate

✍ Scribed by S. M. Gabbay; P. R. Sundararajan; R. H. Marchessault

Publisher: Wiley (John Wiley & Sons)
Year: 1972
Tongue: English
Weight: 775 KB
Volume: 11
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.1972.360110106

No coin nor oath required. For personal study only.

✦ Synopsis

By means of x-ray fiber diffraction, it has been found that xylan diacetate crystallizes with two chains or four residues in a monoclinic cell (space group P21): a = 7.64, b = 12.44, c (fiber axis) = 10.31 A, and y = 85". Pairs of residues are related by a twofold screw axis in the c direction. Based on the observed fiber repeat and chain symmetry, the probable conformation of a pair of xylose diacetate residues joined via a p-1,4' linkage has been obtained by energy minimization methods. The conformations corresponding to a threefold screw axis and a twofold screw axis along the chain have been compared and the reason why xylan diacetate assumes a twofold screw axis seems to be due to intermolecular packing effects rather than intramolecular non-bonded interactions.

📜 SIMILAR VOLUMES

X-ray studies on cellophane1

✍ A. Venkateswaran 📂 Article 📅 1969 🏛 John Wiley and Sons 🌐 English ⚖ 440 KB 👁 1 views

X-ray studies on ligands

✍ Jeffrey R. Deschamps; Judith L. Flippen-Anderson; Clifford George 📂 Article 📅 2002 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 147 KB 👁 1 views

X-Ray Absorption and X-Ray Diffraction S

X-Ray Absorption and X-Ray Diffraction Studies on Molybdenum Doped Vanadium Pentoxide.

✍ Frank Haass; Andreas H. Adams; Thorsten Buhrmester; Guido Schimanke; Manfred Mar 📂 Article 📅 2004 🏛 John Wiley and Sons ⚖ 50 KB

X-Ray and Neutron Diffraction Studies on

X-Ray and Neutron Diffraction Studies on “Li4.4Sn”.

✍ Corina Lupu; Jiang-Gao Mao; J. Wayne Rabalais; Arnold M. Guloy; James W. Jr. Ric 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 53 KB 👁 2 views

## Abstract For Abstract see ChemInform Abstract in Full Text.

1H NMR model studies of amphotericin B:

1H NMR model studies of amphotericin B: Comparison of x-ray and NMR stereochemical data

✍ Pawel Sowiński; Jan Pawlak; Edward Borowski; Pierluigi Gariboldi 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 407 KB

## Abstract ^1^H NMR data for amphotericin B methoxycarbonylmethylamide extracted from DQF‐COSY, ROESY and 1D spectra were compared with x‐ray data for amphotericin B. The conformation of amphotericin B in solution was identical with that found by x‐ray analysis in the solid state. Most of the rela

X-ray Diffraction Studies on Sputtered T

X-ray Diffraction Studies on Sputtered TiN Films

✍ Dr. rer. nat. D. Stemmler; M. Puff 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 157 KB