1,3,2-diazaborole (4a) and Similarly, 1,3-di-tert-butyl-2-trimethylstannyl-2,3-dihydro-1H-1,3,2-diazaborole (8a) and 1,3-bis(2,6-dimethylphenyl)-2-1,3-bis(2,6-dimethylphenyl)-2,3-dihydro-1H-1,3,2-diazaborole (4b) were formed by the reaction of the corresponding trimethylstannyl-2,3-dihydro-1H-1,3,2-
Synthesis of copolymer of 1,3-dioxan-2-one and 2-hydro-2-oxo-1,3,2-dioxaphosphorinane
β Scribed by Bin Hu; Renxi Zhuo; Changlie Fan
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 263 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1042-7147
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β¦ Synopsis
A new type of copolymer was synthesized by ringopening polymerization of 1,3-dioxan-2-one (TMC) and 2-hydro-2-oxo-1,3,2-dioxaphosphorinane (TMP) using (i-C 4 H 9 ) 3 Al as the initiator. The chemical structure was characterized by 1 H nuclear magnetic resonance and Fourier transform infrared. The respective reactivity ratios of TMC and TMP were determined using the KelenΒ±Tu Γ do Γs method. Conversion studies showed that the composition of the copolymer agree with the feed composition at high conversions.
π SIMILAR VOLUMES
Copolymers of 7-oxabicyclo[2.2.1]heptane (B) (and of its 2-methyl derivatives) with 1,3-dioxane (D) were obtained by cationic copolymerization initiated with benzoylium hexafluoroantimonate. Structure of copolymers was determined by 1 H-and 13 C-NMR. The proportion of the acetal bonds in copolymers
3, were synthesized by cyclization of 4-propylthio-1,2-phenylenediamine ( 3) with the corresponding dichlorophosphoryl carbamates/thiocarbamates (2a-J) that were obtained by the addition of alcohols/thiols to isocyanatophosphoryl dichloride (1). The structures of the title compounds were confirme