## Differential thermal analysis and differential scanning calorimetry showed that the title compounds decomposed at 240-260°C with release of the fragment RP(0) = CH,. Mass spectral studies also showed this to be a fragmentation pathway. The extruded methylenephosphine oxide could be trapped with
GENERATION OF P-DIALKYLAMINO METHYLENEPHOSPHINE OXIDES BY THE PHOTOCHEMICAL FRAGMENTATION OF 2-DIALKYLAMINO-2-PHOSPHABICYCLO[2.2.2]-OCTA-5,7-DIENE 2-OXIDES
✍ Scribed by Keglevich, György; Újszászy, Kálmán; Quin, Gyöngyi S.; Quin, Louis D.
- Book ID
- 127207460
- Publisher
- Taylor and Francis Group
- Year
- 1995
- Tongue
- English
- Weight
- 294 KB
- Volume
- 106
- Category
- Article
- ISSN
- 1042-6507
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📜 SIMILAR VOLUMES
## Abstract A series of new P‐methylphenyl P‐heterocycles are introduced. The para and ortho substituted 2,5‐dihydro‐1H‐phosphole oxides (**__1a__** and **__1b__**) were converted to the double‐bond isomers (**__A__** and **__B__**) of 1,2‐dihydrophosphinine oxides (**__3a__** and **__3b__**) via t
1,6-Dihydrophosphinine I -oxides with 4-chloro-3(or 5)-methyl substituents give cycloadducts with dimethyl acetylenedicarboxylate having the 2-phosphabicyclo[2.2.2]octa!-5,7-diene ring system that can be fragmented easily on irradiation with ultraviolet light (254 nm). The phosphorus-containing brid