MOLYBDIC OXIDE
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— key to new family of Molybdic oxide, Mo0 3 , and the related molyb- dates, R>Mo0 4 , form chelates or complexes 'with many organic oxygen, sulfur and nitrogen compounds. Among these are: Polybasic adds Polyalcohols Polyphenols Thiophenols Xanthates β-diketones Aromatic bases Amines Each of these classes of compounds forms a number of complexes with varying properties. For example, oxalic acid forms complexes with molybdenum in the 4-3, +4, + 5 and 4-6 valence states. Some typical properties of these oxalates are described at right- Mo 111 oxalates are non-ionic. Examples are the water-soluble Mo 2 0(C 2 0 4 ) 2 -6H 2 0 and the insoluble Mo 4 0 3 (C 2 0 4 ) 3 ·Τ 2H 2 0. Mo lv oxalates are both ionic and non-tonic. Ionic complexes of the type Η 2 Μο 3 0 4 {0 2 0 4 ) 3 '2Η 2 0 are strong reducing agents. They are red in acid solution, blue in alkaline. Among non-ionic complexes are the purple Mo-0 6 (C 2 0 4 ) 4 and the brown Mo 4 0 5 (C 2 0 4 ) s -10H 2 0, both soluble in water but insoluble in organic solvents. Mo v oxalates are highly colored. Salts of the type RMo0 2 (C 2 0 4 ) · KLO are red in concentrated water solution, but turn yellow on dilution. Mineral acids convert them to other highly colored com- pounds; for example HCI yields green complexes of the type RotMoOCy. Other Mo v complexes include the orange {C 3 H 6 N)H· Mo0 4 O s (C 2 OJ 4 -6H 2 0, the red Κ Mo0 2 (C 2 0 4 ) · H>0, and the yellow (C 0 H H N)MoO 2 (C 8 O 4 )*H 2 O and Mo 2 0 3 (C 2 0 4 ) 2 -4H 2 0. Mo vl oxalates are water soluble, but their amine salts are not. These complexes are apparently ionic, Can you use. these chelating powers of molybdenum? They are discussed more fully in a new bulletin, "Organic Complexes of Molybdenum". Write for it and for. samples of molybdk oxide or sodium molybdate to Climax Molybdenum Company, Dept. 22, 500 Fifth Avenue, New York 36, N.Y. CI-llVfllAX MOLYBDENUM JUNE 25. 1956 C&EN 3205 ^^'^^^He''P^^^^^^P'^B''^^^^^BS!^^^^B""^^B!i?^5^^^^^^^BIÎ!SS^HFMl'^^^^^^^^^^BBi : fflk tfBHkk nui ,^&ρ^ι^ ^ΒΗΜΒΊΙ M O L Y B D I C O X I D E
Transcript of MOLYBDIC OXIDE
— key to new family of
Molybdic oxide, Mo0 3 , and the related molyb-dates, R>Mo04, form chelates or complexes 'with many organic oxygen, sulfur and nitrogen compounds. Among these are:
Polybasic adds Polyalcohols Polyphenols Thiophenols
Xanthates β-diketones Aromatic bases Amines
Each of these classes of compounds forms a number of complexes with varying properties. For example, oxalic acid forms complexes with molybdenum in the 4-3, +4 , + 5 and 4-6 valence states. Some typical properties of these oxalates are described at right-
Mo111 oxalates are non-ionic. Examples are the water-soluble Mo20(C204 )2 -6H20 and the insoluble Mo403(C204)3·Τ 2H 2 0.
M o l v oxalates are both ionic and non-tonic. Ionic complexes of the type Η2Μο304{0204)3 '2Η20 are strong reducing agents. They are red in acid solution, blue in alkaline. Among non-ionic complexes are the purple Mo-06(C204)4 and the brown Mo405(C204)s-10H20, both soluble in water but insoluble in organic solvents.
M o v oxalates are highly colored. Salts o f the type RMo02(C204) · KLO are red in concentrated water solution, but turn yellow on dilution. Mineral acids convert them to other highly colored compounds; for example HCI yields green complexes of the type RotMoOCy. Other Mo v complexes include the orange {C3H6N)H· Mo0 4O s (C 2OJ 4 -6H 20, the red Κ Mo02(C204) · H>0, and the yellow (C0HHN)MoO2(C8O4)*H2O and Mo203(C204)2-4H20.
M o v l oxalates are water soluble, but their amine salts are not. These complexes are apparently ionic,
Can you use. these chelating powers of molybdenum? They are discussed more fully in a new bulletin, "Organic Complexes of Molybdenum". Write for it and for. samples of molybdk oxide or sodium molybdate to Climax Molybdenum Company, Dept. 22, 500 Fifth Avenue, New York 36, N.Y.
CI-llVfllAX MOLYBDENUM
J U N E 25. 1956 C&EN 3 2 0 5
^^'^^^He''P^^^^^^P'^B''^^^^^BS!^^^^B""^^B!i?^5^^^^^^^BIÎ!SS^HFMl'^^^^^^^^^^BBi:fflk tfBHkk nu i ,^&ρ^ι^ ^ΒΗΜΒΊΙ
M O L Y B D I C O X I D E
