✦ LIBER ✦

Structures de modeles de polyesters—I. Separation et etude par RMN [13C]des dihydroxy-2,3 butane, 2,4 pentane et 2,5 hexane et de leurs benzoates

✍ Scribed by M.F. Grenier-Loustalot; P. Grenier

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 395 KB
Volume: 18
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(82)90050-7

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Etude spectroscopique (i.r., RMN1H et 13

Etude spectroscopique (i.r., RMN1H et 13C) de derivés de la N-méthyl 2H-dihydro-3,4 benzoxazine-1,3. Influence de la substitution de l'homocycle

✍ Christian Proponet; Bernard Laude; Mohamed Ramah; G. Riess 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 456 KB

The spectroscopic properties (i.r., NMRIH and 13C) of substituted N-methyl 2H-3,4 dihydro 1,3-benzoxazines has been studied. Infrared and NMR~H data allow to determine structures of isomers and NMR~3C exhibits electronic and steric effects of substituents.

Stéréochimie de (2S, 4S, 5R;2S, 4S, 5S)-

Stéréochimie de (2S, 4S, 5R;2S, 4S, 5S)- et (2R, 4S, 5R;2R, 4S, 5S)-2-alkyl-1,3,4-triméthyl-5-phénylimidazolidines déterminée par RMN-−1H et -−13C

✍ D. Tytgat; M. Gelbcke 📂 Article 📅 2010 🏛 Wiley (John Wiley & Sons) ⚖ 339 KB 👁 1 views

The condensation of (1 R,2S) or (lS,2S)-N,N'-dimethyI-l-phenylpropane-l 2-diamines with aldehydes gives respectively two diastereorneric 2-alkyl-l,3,4-trimethyI-S-phen limidazolidines. At thermodynamical equilibrium the major isomer in the erythro series is this one where t f ! e substituents at pos