Cycloaddukten. Bei hoherer Temperatur (ca. 60°C) polymerisieren die a-Methylen-p-lactone 9 . Wegen der hohen Gentoxizitat der analogen a-Methylen-y-butyrolactone, die Bestandteile zahlreicher Naturstoffe mit sehr unterschiedlichen biologischen Wirkungen sindI6l, sollten die cancerogenen Eigenschafte
Synthesis and Molecular Structure of the Diphosphaarsirane [{[(η5-C5Me5)(CO)2Fe]P}2AsC66H2tBu3]
✍ Scribed by Prof. Dr. Lothar Weber; Dipl.-Chem. Dagmar Bungardt; Uwe Sonnenberg; Dr. Roland Boese
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 389 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
✦ Synopsis
40°C. Slow warm-up to room temperature, column chromatographic work-up (silica gel flash chromatography, elution with a 10 : 1 : 1 mixture of dichloromethane, petroleum ether (30-50°C) and diethyl ether), and Kugelrohr distillation (bath temperature 45 "C at 0.1 torr) afforded the a-methylene-p-lactones 9a-c in 27, 48 and 40% yields, re-
📜 SIMILAR VOLUMES
Reaction of equimolar amounts of the ferriophosphaalkene P; M = Al (2a), Ga (3a), In (4a) and E = As; M = Al (2b), Ga (3b), and In (4b). These compounds feature η 1 -coordination [(η 5 -C 5 Me 5 )(CO) 2 FeP=C(NMe 2 ) 2 ] (1a) or the ferrioarsaalkene [(η 5 -C 5 Me 5 )(CO) 2 FeAs=C(NMe 2 ) 2 ] (1b) wi
The crystallographic dataC3] and the molecular dimensions of ( 4 ) and ( ) are almost identical. We thus have one of those rare cases in which analyses and spectraL4] are more significant in identifying the compounds than structure determination. The most important structural characteristic of ( 4 )