Two series of polyesters containing phenoxaphosphine rings and several halogens were synthesized by low-temperature solution polycondensation in the presence of triethylamine. One series, containing halogens only in the bisphenol moiety, was obtained from 2,8-dichloroformyl-10-phenylphenoxaphosphine
A New Method for the Synthesis of Amphipolar Phosphorus-Containing Heterocycles
β Scribed by Prof. Dr. Hans H. Karsch; Dipl.-Chem. Eva Witt; Dr. Arnold Schneider; Dr. Eberhardt Herdtweck; Dipl.-Chem. Maximilian Heckel
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Volume
- 34
- Category
- Article
- ISSN
- 0044-8249
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β¦ Synopsis
polarization functions at all atoms Ld (C.P) = 0.8, 0.5; LJH) = 0.65; active space for the MCSCF geometry optimization 3a, plus 3a, orbitals; the multireference calculations were carried out in this space. All MCSCF and MRCl calculations were undertaken with the program system MOL-PRO (201.
π SIMILAR VOLUMES
Two consecutive [3+2] cycloaddition reactions of the diphosphanylketenimine (PPh(2))(2)C[double bond]C[double bond]NPh (3), involving the phosphanyl groups, with two equivalents of the electron-poor alkynes dimethyl acetylenedicarboxylate or methyl acetylenecarboxylate give rise to the formation of
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of Groups IVb and Vb as tridentate ligands to transition metal carbonyls have hitherto failed. We have now been able to prepare the first representative of this class of compounds, nonaphenylcyclotrisiIaphosphanetricarbonyln~olybdenum(0) ( I ) , by reaction of nonaphenylcyclotrisilaphosphane 131 wit