SUBSTITUENT EFFECTS AT ELEMENTS OTHER THAN CARBON .2. IONIZATION POTENTIALS

Ionization potentials of XF, XCI, XBr, XI, X2O, XOMe, XSH, XSMe, XSEt, X3N, and X3P were correlated with the extended Hammett equation Qx - ασI,x + βσR,X + h with generally good results. For X.,Y, αγ = mxY + c. For XY, αγ = mσI,Y + c; βY = m'σR.Y + cʹ. It is concluded that substituent effects on ionization potentials in compounds substituted at halogen, oxygen, sulfur, nitrogen, or phosphorus may be represented by substituent constants derived from compounds substituted at carbon. © 1969, American Chemical Society. All rights reserved.