15 Conjugate Base of Tetraphosphacubane tetrasulfide 3A optimized at MP2/6- 31+G* C 0.000000 0.000000 -1.605625 P 0.000000 0.000000 1.607306 S 0.000000 0.000000 3.548008 P 0.000000 -1.508054 -0.604444 P 1.306013 0.754027 -0.604444 P -1.306013 0.754027 -0.604444 C 0.000000 1.515268 0.521752 C 1.312260 -0.757634 0.521752 C -1.312260 -0.757634 0.521752 H 0.000000 2.531008 0.922770 H 2.191917 -1.265504 0.922770 H -2.191917 -1.265504 0.922770 S 0.000000 -3.362783 -1.170913 S 2.912256 1.681392 -1.170913 S -2.912256 1.681392 -1.170913