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Sulfonic acid derivatives or salts as stabilizers in electroless gold coating: Sulfonic acid derivatives or salts as stabilizers in electroless gold coating. Yoshitani, Masaaki; Nakazawa, Masao; Wakabayashi, Shinichi (Shinko Electric Industries Co.In this study， 86-66-8 and 1333-07-9 are also used., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 03193882 A2 23 Aug 1991 Heisei, 4 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C23C018-44. APPLICATION: JP 89-332162 21 Dec 1989. DOCUMENT TYPE: Patent CA Section: 56 (Nonferrous Metals and Alloys) The electroless bath contg. alkali hydroxide, alkali cyanide, water-sol. Au salt, and a B-contg. reducing agent is stabilized with a deriv. and/or salt of sulfonic acid, sulfonamide, or sulfonimide. The stabilizer is preferably aminobenzenesulfonic acid, 1,5-naphthalenedisulfonic acid, 1,3,6-naphthalenetrisulfonic acid, or their alkali metal salt. .

Structure and reactivity of a naphthalene nucleus: Structure and reactivity of a naphthalene nucleus. Nitration of 1,3,6-naphthalenetrisulfonic acid. Ufimtsev, V. N. (Nauchno-Issled. Inst. Org.Some commonly used reagents like 86-66-8 and 11104-93-1 are used in this experiment. Poluprod. Krasitelei, Moscow, USSR). Zh. Org. Khim., 19(9), 1930-3 (Russian) 1983. CODEN: ZORKAE. ISSN: 0514-7492. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Tri-Na 1,3,6-naphthalenetrisulfonate (I) nitration in concd. H2SO4 required the presence of HONO or N oxides for initiation. Steric hindrance prevented attack by NO2+ on I. A mechanism was proposed involving oxidn. of an intermediate I-NO+ adduct. .