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Studies on organo‐phosphonis, ‐arsenic and ‐antimony polytungstates and polymolybdates: II. Degradation method for preparing arylarsenic polytungstates
Author(s) -
Liu BenYao,
GuYihTong Ku YiDong,
Wang Xin
Publication year - 1989
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19890070209
Subject(s) - chemistry , antimony , arsenic , degradation (telecommunications) , environmental chemistry , inorganic chemistry , organic chemistry , telecommunications , computer science
Six guanidinium salts of arylarsenic polytungstates have been prepared by the “degradation method” using sodium metatungstate as a starting material instead of sodium tungstate. They belong to three types of complexes: [(RAs) 2 W 6 O 25 H] 5‐ where R = C 6 H 5 (1), o ‐NO 2 C 6 H 4 (2), m ‐NO 2 C 6 H 4 (3), p ‐NO 2 C 6 H 4 (4), [(RAs) 2 W 6 O 25 ] 4‐ where R= p ‐NH 2 C 6 H 4 (5), and [(RAs) 2 W 6 O 25 ] 6‐ where R = 3, 4, ‐C 6 H 3 (NO 2 ) (OH) (6). Complex 1 is a known compound, prepared by the acidification building up method, i.e. conversion of sodium tungstate to polytungstate. Complex 1 and 6 prepared by the degradation method, i.e. from sodium metatungstate to lower polytungstate, are briefly reported in our previous report of this investigation. Complexes 2—5 are new compounds. Molecular structures of complexes 5 and 6 have been determined by means of single‐crystal X‐ray diffraction studies. It is especially emphasized that the degradation method starting with metatungstate has the advantage in the simplification of reaction products, thus leading to their higher yields.