STRUCTURE OF AMMONIUM-SALTS OF 2-OXY-1,4-BUTYLENE AND 2-OXY-1,5-AMYLENEPHOSPHORIC ACIDS

The structures of dioxaphosphepane (I) and dioxaphosphecane (II) salts prepared by hydrolysis of the corresponding bicyclophosphates have be en compared. In both cases, hydrolysis occurs with breaking of the P-O bond of the fragment at the secondary carbon atom of bicyclophosphate . In phosphocycles I and II, the endocyclic bond angles O-P-O are 104. 2 and 104.9-degrees and the exocyclic ones are 117.7 and 118.6-degrees , respectively. Conformations of the anions in I and II differ substan tially. for I it is a ''twist'' conformation C1T(C4), and for II a ''d istorted armchair.'' The data obtained are compared with those found e arlier for similar molecules.