C[N+](C)([C-]=[P+]=O)CCO	246	Strange valence at P
CC[B+]CC	251	Strange valence at B
CN(C)C(Cl)=[Cl+]	206	Strange valence at Cl
O=S(F)(F)(F)F	142	Strange valence at S
CN(C)C(=[Cl+])N(C)C	354	Strange valence at Cl