Application of “Rule of Mass Shift” to Sulfur and Phosphorus Functional Groups that Have Coordinate Covalent Bonds to Oxygen

Abstract

e rule of mass shii was reexamined for the fragmentation of nitrogen-, sulfur-, or phosphorus-containing functional groups that contain coordinate covalent bonds to oxygen atom s. A new set of supplementary mass shii values is proposed for the fragmentation of these sulfur and phosphorus compounds, based on the consideration that positively charged, even electron ions with an electron-deecient sulfur or phosphorus atom are regarded as being stable in the gas phase, unlike the case of nitrogen analogues. Several typical modes of bond cleavages of these functional groups are illustrated and discussed.