Reference

Structural data from infrared spectra of metal(II) acetate crystal hydrates

Structural data from infrared spectra of metal(II) acetate crystal hydrates. Stoilova, D.; Nikolov, G.; Balarev, Kh. (Higher Inst. Chem. Technol., Burgas, Bulg.). Izv. Khim., 9(2), 371-81 (English) 1976. CODEN: IZKHDX. DOCUMENT TYPE: Journal CA Section: 73 (Spectra by Absorption, Emission, Reflection, or Magnetic Resonance, and Other Optical Properties) The following 2 methods used thus far for detecting the type of bonding of the acetate ligand are crit. examd.: (1) the direction of the shift of .nu.as(CO) and .nu.s(CO) (Nakamoto, K., 1968); and (2) the numerical value of the difference .DELTA.Several substances like 5743-26-0 may be metioned in this study. = .nu.as(CO)-rs(CO) (Cotton, F. A., 1960). In some cases both methods give unreliable results probably due to the mixing of the COO group stretching vibrations with other vibrations of the complex. A new criterion is proposed for detecting the type of bonding of the acetate ligand. This criterion is based on the finding that unidentate acetate shows 3 bands in the 720-920 cm-1 region (probably due to COO bending vibrations .delta.(OCO)) and a strong band at about 540 cm-1 (out-of-plane COO bending vibration, .pi.(OCO)). These bands are absent if the acetate is bridged or their no. is reduced if the acetate ligand is bidentate. This new criterion is helpful if used in conjunction with the above 2 criteria. IR data for mixed crystals show that the isodimorphous substitution of the metal ion is not additive with respect to the IR spectra of the 2 metal ion acetates present in the mixed crystal. .

Polyester fiber manufacture

Polyester fiber manufacture. (Teijin Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58132116 A2 6 Aug 1983 Showa, 8 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: D01F006-92; D01F006-62; D06M005-02. APPLICATION: JP 82-13392 1 Feb 1982. DOCUMENT TYPE: Patent CA Section: 40 (Textiles) Polyester fibers with improved dyeing yield are prepd. by polycondensing a dicarboxylic acid with a glycol in the presence of a P compd.Some commonly used reagents like 546-89-4 and 5743-26-0 are used in this experiment. ROP(O)(OR)OR10.5, where R is H or a monovalent org. group and R1 is an alk. earth metal, an alk. earth metal compd., and an alkali metal compd. and then dissolving the compds. with an alkali to form pores on the surface. Thus, 100 parts di-Me terephthalate was polycondensed with 60 parts ethylene glycol in the presence of a mixt. contg. the reaction product [88373-22-2] of 1 mol tri-Me phosphate with 0.5 mol Ca acetate monohydrate 9.31, Calcium acetate monohydrate [5743-26-0] 0.26, and lithium acetate [546-89-4] 0.24 part to give poly(ethylene terephthalate) (I). I was pelletized, spun at 290°, drawn 250%, twisted, and twist-set 30 min at 80°. A woven fabric was prepd., creped, sapond. with 3.5% NaOH to wt. loss 10%, and dyed with a liquor contg. 15% (on fiber wt.) Dianix Black HG-FS for 60 min at 130° to give a black fabric with high color depth. .