Reference

Process for the preparation of poly(phenylene ether)s at elevated pressure

Process for the preparation of poly(phenylene ether)s at elevated pressure. Bennett, James G.; Cooper, Glenn D. (General Electric Co., USA). U.S. US 4032512 28 Jun 1977, 4 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G065-44. NCL: 260047000ET. APPLICATION: US 73-401985 1 Oct 1973. DOCUMENT TYPE: Patent CA Section: 35 (Synthetic High Polymers) Poly[oxy(2,6-dimethyl)phenylene] (I) [24938-67-8] was prepd. by oxidative coupling of 2,6-xylenol in a reaction system contg. (a) O at 25-100 psig and (b) a complex formed from a cupric halide and Bu2NH [111-92-2]. Thus, a :45 xylenol-CuBr2 [7789-45-9]-Bu2NH system at 35 psig O required 33 min to reach intrinsic viscosity 0.55 dL/g in benzene, compared to 92 min in the absence of O.

Identification of inner- and outer-sphere types of certain acid complexes of copper(II)

Identification of inner- and outer-sphere types of certain acid complexes of copper(II). Koneva, T. N.; Fedorov, V. A.; Trofimov, G. L. (Sib. Tekhnol. Inst., Krasnoyarsk, USSR). Zh. Fiz. Khim., 51(4), 793-5 (Russian) 1977. CODEN: ZFKHA9. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) Section cross-reference(s): 69 Formation of Cu2+ complexes with Xn- (X = Cl, Br, SO4) was studied by spectrophotometric, thermochem., and ESR methods in 2 and 4N Li(ClO4, X) aq. solns. Formation consts. and enthalpies and entropies of soln.In this experiment, several chemicals are used like 7758-98-7 and 7789-45-9 were detd. for the Cl- and SO42- complexes. The Cl- complex (Cu(H2O)5Cl+) is predominantly inner sphere, while the Br- and SO42- complexes (Cu(H2O)62+, Xn-) are predominantly outer sphere (with some Cu(H2O)5Br+ and Cu(H2O)4(SO4) forming at ionic strength 4). .