Detail of "14239-07-7"

CAS Number:
14239-07-7
Name:
Potassium tris(oxalato)cobaltate(III)
Molecular Structure:
Formula:
C₆Co O₁₂ .3 K
Molecular Weight:
440.29
Synonyms:
Cobaltate(3-),tris(oxalato)-, tripotassium (8CI);Cobaltate(3-), tris[ethanedioato(2-)-O,O']-,tripotassium, (OC-6-11)-;Cobaltate(3-), tris[ethanedioato(2-)-kO1,kO2]-, tripotassium, (OC-6-11)- (9CI);Potassiumoxalatocobaltate(III) (K3Co(C2O4)3) (6CI);NSC 97333;Potassiumtrioxalatocobaltate (III);Cobaltate(3-),tris[ethanedioato(2-)-kO1,kO2]-, potassium (1:3), (OC-6-11)-;Tripotassiumtrioxalatocobaltate;Tripotassium trioxalatocobaltate(3-);Tripotassiumtris(oxalato)cobaltate(3-);Tripotassium tris(oxalato)cobaltate(III);

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Light-initiated polymer and polymerization reactions: Light-initiated polymer and polymerization reactions. 8. Photoinduced decomposition of arene diazonium salts by metal oxalates. Baumann, H.; Strehmel, B.; Timpe, H. J.; Rehorek, D. (Sekt. Chem., Tech. Hochsch. "Carl Schorlemmer" Leuna-Merseburg, Merseburg DDR-4200, Ger. Dem. Rep.). J.In this article, certain chemicals are used. One of their cas registry numbers is 14883-34-2 Prakt. Chem., 325(5), 753-63 (German) 1983. CODEN: JPCEAO. ISSN: 0021-8383. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 22, 67, 72 The photochem. dissocn. of arenediazonium salts in the presence of K Fe oxalate (3:1:3) (I) [14883-34-2] or K Co oxalate (3:1:3) [14239-07-7] proceeds by electron transfer between ·CO2- and, in the presence of I, [Fe (oxalate)2]2- (except for p-(dialkylamino)benzenediazonium salts). The formation of aryl radicals was demonstrated by trapping with nitrosodurene. The quantum yields in dissocn. (0.15-1.21) depended on the redn. potential of the salts and the oxalate concn. For diazonium salts bearing electron acceptor groups, the quantum yields were the same as those for a I actinometer. For the electron transfer of Fe(II) species, the Hammett r const. was 1.7. These systems are efficient initiators for photopolymn. .

Light-induced polymer and polymerization reactions: Light-induced polymer and polymerization reactions. 14. Radical photopolymerization by potassium tris(oxalato)cobaltate-arylonium salt systems. Baumann, H.; Strehmel, B.; Timpe, H. J.; Lammel, U. (Sekt. Chem., Tech. Hochsch. "Carl Schorlemmer", Leuna-Merseburg, Ger. Dem. Rep.). J. Prakt. Chem., 326(3), 415-25 (German) 1984. CODEN: JPCEAO. ISSN: 0021-8383. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 74 The photopolymn. of acrylamide [79-06-1] by tri-K trisoxalatocobaltate (I) [14239-07-7] is inefficient because the ·CO2- radicals formed are oxidized or terminate with polymer radicals. Adding onium salts increases the initiation efficiency in the order p-MeOC6H4N2+BF4- [459-64-3] >Ph2I+Cl- [1483-72-3] >PhCOCH2SMe2+BF4- [24806-57-3] >Ph3S+BF4- [437-13-8]. A mechanism is proposed, based on quantum yields and including electron transfer from ·CO2- to onium compds., giving radicals which also initiate polymn. The reaction order in monomer concn. decreases in the presence of Ph2I+ from 1.4 to 1.1. Quantum yields for polymn. are higher in the presence of I than in that of the corresponding ferrate complex.