Reference

Stable arylsulfonium salt-solvent mixture

Crivello, James Vincent (General Electric Co., USA). Fr. Demande FR 2459265 09 Jan 1981, 18 pp. (French). (France). CODEN: FRXXBL. CLASS: IC: C08K005-36; C08K005-49; C08K005-59. PRIORITY: US 79-49296 790618. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 25, 27, 28 A stable mixt. of a triarylsulfonium salt (e.g., hexafluoroantimonate) and a C2-3-alkylene carbonate is prepd. for use as a photohardening catalyst for epoxy resins. The mixt. gives cured resins with greater hardness than resins cured in the absence of the carbonate. Ph3Se+ AsF6- [57900-43-3], Ph3Se+ SbF6- [57836-00-7], Ph3Se+ BF4- [437-14-9], and 24 arylsulfonium salts with AsF6-, SbF6-, or PF6- as the anion and with Ph3S+, p-(Me3C)C6H4S+Ph2, I, II, or a similar group as the sulfonium group are prepd. for use as photopolymn. or photocrosslinking catalysts, e.g., for epoxy resins and styrene oxide. Thus, 26 parts NaSbF6 [16925-25-0] in 80 parts propylene carbonate (III) [108-32-7] was treated with 59.7 parts 50% aq. Ph3S+ Cl- [4270-70-6] and freed of NaCl to prep. a soln. of 50% Ph3S+ SbF6- [57840-38-7] in III. The soln. was stable in an open container for >12 mo. The soln. was used (4%) as a catalyst for the photohardening of 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate.

Pressure-induced Fm3 phase transition in NaSbF6

Pressure-induced Fm3 phase transition in NaSbF6. Sowa, H. (Inst. Mineralogie, Petrologie und Kristallographie, Philipps-Univ. Marburg, Marburg D-35032, Germany). Acta Crystallographica, Section B: Structural Science, B53(1), 25-31 (English) 1997 Munksgaard. CODEN: ASBSDK. ISSN: 0108-7681. DOCUMENT TYPE: Journal CA Section: 75 (Crystallography and Liquid Crystals) High-pressure x-ray diffraction measurements on NaSbF6 powder were performed up to 5.63(7) GPa. 16925-25-0 is the cas registry number of certain chemical which is used as reagents here. At ~0.1 GPa the cubic low-pressure phase with ordered ReO3-type crystal structure undergoes a phase transition into a rhombohedral LiSbF6-type modification. The high-pressure behavior of this phase was characterized by rotations and distortions of the coordination octahedra, but it also can be described with a sphere-packing deformation. The octahedral distortions are probably caused by cation-cation repulsions. .