Description: 987 organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system / 987 organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system/(30) phosphorus compounds (9/02; 9/06) (116) contains at least one (c)-p bond (9/28) (136) trivalent p having the structure (c)2-p(xh or x-salt) or pentavalent p having the structure (c)2-p(=x) (xh or x-salt) where x is chalcogen (9/46)
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