Configurational and Conformational Selectivity in Catalytic Oxidations on Platinum Catalysts

✍ Scribed by Prof. Dr. Kurt Heyns

• Publisher: John Wiley and Sons
• Year: 1970
• Tongue: English
• Weight: 245 KB
• Volume: 9
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197003832

✦ Synopsis

units, or presence of other bulky substituents results in loss of this orientation capacity; moreover, such siloxanes spread considerably more slowly than those mentioned above. Siloxanes bearing hydrophilic groups, e.g. hydroxymethyl or aminomethyl substituents, exhibit a capacity for orientation and a particularly high affinity for water. They are excellent agents for forming extremely thin, water-repellent, detergentresistant, brilliant films on solid surfaces to which they are held by an adsorbed layer of water.

Lecture at Bonn o n December 2, 1969 [VB 233 IE1

German version: Angew. Chem. 82, 363 (1970) Yb*' in liquid ammonia is therefore a stronger reducing agent than potassium. In fact, elemental potassium is found in the residue left on evaporation of the ammonia. The reductive power is further increased by the extreme insolubility of Yb(NH& in liquid ammonia. The same reaction occurs with the iodides of EU(II) and Sm(I1). Within certain limits, ZrBr3 behaves similarly t o EuI1, YbII, and SmII'9J.

Recent experiments have shown that the equilibrium