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Citation: Zhou Zinan, Wang Songbo, Wu Shengrong, Wang Yan. Two Configurations of the Isolate 1,2-unit in PBD Chain[J]. Chinese Journal of Applied Chemistry, ;1987, 4(1): 73-74. shu

Two Configurations of the Isolate 1,2-unit in PBD Chain

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Corresponding author: Zhou Zinan,
Received Date: 12 April 1986
Available Online: 2 August 1986

Three small peaks 4', 6' and 8' in the aliphatic part of ¹³C-NMR spectrum of poly-butadiene (PBD) have been observed. Their appearance is considered to be related with the peaks 4,6 and 8 of the isolate 1,2-unit in PBD and to be a result of the splitting of the latter three peaks, respectively. In order to explanation these results authors of this paper consider that there must exist a new, with a higher energy level, configuration, which would show a certain shielding effect on the C_α and C_γ but decrease the shielding effect on the C_β of the isolate 1,2-unit of PBD chain.
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