Fragmentation of an N-Substituted One-Coordinate Phosphorus (Phosphaalkyne): Plausible Generation of Monovalent Phosphorus Species
摘要:
A new one-step synthesis of a stable nitrogen-substituted phosphaalkyne (5) was developed, by the condensation of CsF (2), tris(trimethylsilyl)phosphine (3), and supermesityl isocyanate (4). Compound 5 has the longest terminal CP bond (1.617 angstrom) of any phosphaalkyne. Due to electron delocalization on the terminal phosphorus atom in 5, fragmentation to a monovalent phosphorus species (CsP (9)) and supermesityl isonitrile (8) is plausible. Isonitrile (8) was isolated in pure form. CsP (9) was trapped as a tricesium pentaphosphorus compound (10) and also as cesium [I,2,4]triphospholide (13).
Potent hydrophilic dienophiles. Synthesis and aqueous stability of several 4-aryl- and sulfonated 4-aryl-1,2,4-triazoline-3,5-diones and their immobilization on silica gel
Some sterically protected 1-aza-3-phosphaallenes carrying 2,4,6-tri-t-butylphenyl group were prepared and the hydrolysis reactions of these azaphosphaallenes were studied.
Carbodiimide aus trisubstituierten aromatischen Isocyanaten, ein Verfahren zu deren Herstellung und deren Verwendung
申请人:Rhein Chemie Rheinau GmbH
公开号:EP2520597A1
公开(公告)日:2012-11-07
Die Erfindung betrifft neuartige Carbodiimide, ein Verfahren zu deren Herstellung und deren Verwendung als Stabilisator, Vernetzer und/oder Kompatibilisator in Thermoplasten, esterbasierten Polyolen für Polyurethan-Anwendungen, in Hartschaum, in Weichschaum oder z.B. in CASE-Anwendungen (Coatings Adhesives Sealants Elastomers).
本发明涉及新型碳二亚胺、其制备方法以及在热塑性塑料、聚氨酯用酯基多元醇、硬质泡沫塑料、软质泡沫塑料或 CASE 应用(涂料、粘合剂、密封剂、弹性体)中作为稳定剂、交联剂和/或相容剂的用途。