COMPLEX EQUILIBRIA OF MOLYBDENUM(V) AND MOLYBDENUM(VI) WITH ORTHO-HYDROXYBENZYLAMINE-N,N,O-TRIACETIC ACID (HBATA)

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作者
ZHANG, HL
WANG, YW
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O61 [无机化学];
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070301 ; 081704 ;
摘要
Complex reactions between Mo(V,VI) and omicron-hydroxybenzylamine-N,N,O-triacetic acid (HBATA) have been investigated in the 1-3 and 2.8-6.5 pH range by potentiometric titration at 30-degrees-C in 0.5 mol dm-3 NaCl. The equilibrium data were analyzed with the SCOGS2 and MINIQUAD programs, taking into account side reactions of Mo(V,VI) and HBATA with hydrogen ion. The favorable reaction model comprises two complexes, (1,1,1)+ and (1,2,2)-, with formation constants log beta-111 = 14.85 +/- 0.11 and log beta-122 = 28.51 +/- 0.08 for the Mo(V)-HBATA system and the two complexes (1,1,2)3- and (1,1,3)2- with formation constants log beta-112 = 17.36 +/- 0.01 and log beta-113 = 20.60 +/- 0.01 for the Mo(VI)-HBATA system. he numbers in brackets refer to the chemical stoichiometric coefficients of molybdenum, HBATA and hydrogen ion in the complexes. The structure and co-ordinating behaviours of Mo(V) and Mo(VI) complexes are discussed. The equilibria studied for the polymerization of Mo(V) indicates that dimeric, trimeric and tetrameric species are present at pH 1-3.
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页码:592 / 595
页数:4
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共 19 条
[1]   NONLINEAR LEAST-SQUARES APPROACH TO THE REFINEMENT OF ALL PARAMETERS INVOLVED IN ACID-BASE TITRATIONS [J].
ARENA, G ;
RIZZARELLI, E ;
SAMMARTANO, S ;
RIGANO, C .
TALANTA, 1979, 26 (01) :1-14
[2]  
BRAUER G, 1963, HDB PERPARATIVE INOR, P1413
[3]   STRUCTURAL STUDIES OF MO(VI) COORDINATION CHEMISTRY CRYSTAL AND MOLECULAR-STRUCTURE OF TRISPOTASSIUM [CIS-TRIOXO(NITRILOTRIACETATO)MOLYBDATE(VI)] MONOHYDRATE [J].
BUTCHER, RJ ;
PENFOLD, BR .
JOURNAL OF CRYSTAL AND MOLECULAR STRUCTURE, 1976, 6 (01) :13-22
[4]   POTENTIOMETRIC INVESTIGATION OF MOLYBDENUM(VI) EQUILIBRIA AT 25-DEGREES-C IN 1-M NACL MEDIUM [J].
CRUYWAGEN, JJ .
INORGANIC CHEMISTRY, 1980, 19 (02) :552-554
[5]   MECHANISM OF MOLYBDENUM(VI) COMPLEX-FORMATION - REACTIONS OF MOLYBDATE WITH 1,2-DIHYDROXYANTHRAQUINONE-3-SULFONATE AND NITRILOTRIACETATE [J].
FUNAHASHI, S ;
KATO, Y ;
NAKAYAMA, M ;
TANAKA, M .
INORGANIC CHEMISTRY, 1981, 20 (06) :1752-1756
[6]   Studies of the reducing action of mercury II Stability of quinquivalent molybdenum solutions - A method for the determination of molybdenum by reduction with mercury and titration with ceric sulfate [J].
Furman, NH ;
Murray, WM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1936, 58 :1689-1692
[7]   MOLYBDENUM SPECIES IN AQUEOUS-SOLUTION - BRIEF SUMMARY [J].
HAIGHT, GP ;
BOSTON, DR .
JOURNAL OF THE LESS-COMMON METALS, 1974, 36 (1-2) :95-102
[8]  
KODAMA K, 1963, METHODS QUANTITATIVE, P216
[9]  
LEGGETT DJ, 1985, COMPUTATIONAL METHOD, P71
[10]  
LI PY, 1990, INORG CHIM ACTA, V173, P255