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) (217) p is trivalent and contains the structure p-(o-c) or p-(o-z) where z is an atom other than h (9/141; 9/141a1) (219) containing the structure p-(o-carbocyclic ring) (9/145) (221) contains the structure p-(o)-[c]n-aryl wherein n is at least one and the aryl ring is bonded to the o atom through a chain of only carbon atoms (9/141a7)
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