✦ LIBER ✦

Structure of alternating cis- and trans-piperylene-maleic anhydride copolymers by 13C-NMR analysis

✍ Scribed by N.G. Gaylord; M. Nagler; A.C. Watterson

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 176 KB
Volume: 19
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(83)90042-3

No coin nor oath required. For personal study only.

✦ Synopsis

The copolymerization of the c/s-and trans-piperylene isomers with maleic anhydride in the presence of a peroxide catalyst yields identical equimolar, alternating copolymers which, according to ~C-NMR analyses of the copolymers and the cyclic Diels-Alder adduct from trans-piperylene and maleic anhydride, have trans-methyl group conformation and trans-l,4 unsaturation.

📜 SIMILAR VOLUMES

Investigations on the dissociation behav

Investigations on the dissociation behavior of hydrolyzed alternating copolymers of maleic anhydride and alkenes: 13C-NMR spectra and potentiometric titrations

✍ Steffi Reinhardt; Hartmut Komber; Volker Steinert 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 341 KB 👁 2 views

The pK, values of the succinic acid moieties of hydrolyzed alternating ethene-and isobutenemaleic anhydride copolymers were determined in D,O. The pD-dependence on the 13C chemical shift of selected signals was analyzed for these copolymers. Four different pK,s were determined for the copolymer with

The 1H and 13C NMR spectra of alternatin

The 1H and 13C NMR spectra of alternating isobutene/maleic anhydride copolymer and the corresponding acid and sodium salt — a stereochemical analysis

✍ Hartmut Komber 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 513 KB

The 'H and I3C NMR spectra of an alternating isobutene/maleic anhydride copolymer and the corresponding acid and sodium salt forms were reexamined by 1D and 2D NMR methods. This copolymer contains only threo-succinyl units. The tacticity is characterized by a 53/41 ratio of threo-diisotactic and thr

The 1H and 13C NMR spectra of an alterna

The 1H and 13C NMR spectra of an alternating ethene/maleic anhydride copolymer and the corresponding acid and sodium salt

✍ Hartmut Komber 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 431 KB

## Abstract The ^1^H and ^13^C NMR spectra of an alternating ethene/maleic anhydride copolymer and the corresponding acid and sodium salt were reinvestigated with regard to the signals depending on the configuration of the succinyl unit. From these assignments a 85/15 ratio of __threo__‐and __eryth

Relation between the alternating monomer

Relation between the alternating monomer unit sequence and the cis and trans linkage configurations at the cyclic maleic anhydride units in the copolymers of styrene and maleic anhydride prepared in carbon tetrachloride

✍ Nguyen T. H. Ha; Kiyohisa Fujimori; Ian E. Craven 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 475 KB

The monomer unit triad sequence distribution and the cidtrans linkage configurations at the cyclic maleic anhydride (MA) units in the copolymers of styrene (ST) and MA prepared in CCI, with AIBN at 50°C were quantitatively determined by 13C DEPT NMR spectroscopy. So much as 61 % of the linkages at t

Analysis of 1H and 13C NMR Spectra of ci

Analysis of 1H and 13C NMR Spectra of cis- and trans-10-Chlorodecal-2-ones by 2D NMR Techniques

✍ G. Di Maio; C. Iavarone; L. M. Migneco; E. Vecchi 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 437 KB 👁 2 views

The 'H and "C NMR chemical shift assignments of trans-and cis-10-chlorodecal-2-ones were based on 2D COSY and HETCOR experiments. The spectra were measured either in CDCI, or in C,D, to optimize the spectral dispersion (ASIS effect). Selective spin decoupling experiments were also performed.

Analysis of 1H and 13C NMR spectra of ci

Analysis of 1H and 13C NMR spectra of cis- and trans-10-substituted decal-2-ones by 2D NMR techniques

✍ G. Di Maio; L. M. Migneco; E. Vecchi; C. Iavarone 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 86 KB 👁 2 views

The 1 H and 13 C NMR chemical shift assignments of 10-substituted decal-2-ones, cis (H, CH 3 and CO 2 CH 3 ) and trans (H, CH 3 , OH and CO 2 C 2 H 5 ) were based on 2D COSY and HETCOR experiments, supported by selective spin decoupling experiments. The discrimination between the cis and the trans c