Abstract
Copolymers of styrene with maleic anhydride (Copolymer I), dimethyl maleate (II), monomethyl maleate (III), dimethyl fumarate (IV), and monomethyl fumarate (V) were prepared; I, III and V were subsequently converted to the diester form. Analysis of the configuration of the diester units in the five copolymers was attempted using 13C-NMR. The absorption of the carbonyl carbon resolved three out of four possible stereoisomers (two threo and two erythro). The three peaks corresponding to the stereoisomers had the same chemical shifts for all copolymers; the intensity ratios for II, III, IV and V were approximately the same and were 2:1.6:1. The middle peak predominates in the absorption of I, indicating stereoselectivity in the opening of the double bond maleic anhydride.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
