[Cl+]=C(N1CCCCC1)N1CCCCC1 17609 Strange valence at Cl CN1CCN(C)C1=[Cl+] 17892 Strange valence at Cl [Cl+]=C(N1CCCC1)N1CCCC1 19441 Strange valence at Cl CO[P-](=O)(O)=C([N+]#N)C(C)=O 40571 Strange valence at P