Polysulfonylamine, CLXXX [1]. Bis(triphenylphosphoranyliden)ammonium-di(methansulfonyl)amid: Eine Kristallstruktur mit CH/π-Wechselwirkungen zwischen Methylund Phenylgruppen / Polysulfonylamines, CLXXX [1]. Bis(triphenylphosphoranylidene)ammonium Di(methanesulfonyl)amide:A Crystal Structure Featuring Methyl-Phenyl CH/π Interactions

• Published in: Zeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 62; no. 9; pp. 1167 - 1173
• Main Authors: Wölper, Christoph, Jones, Peter G., Blaschette, Armand
• Format: Journal Article
• Language: English
• Published: Verlag der Zeitschrift für Naturforschung 01-09-2007
• Subjects: Activated Methyl Groups; Methyl-Phenyl CH/π Interactions,Weak Hydrogen Bonding; Multiple Phenyl Embraces; Sulfonamides
• ISSN: 0932-0776; 1865-7117
• DOI: 10.1515/znb-2007-0910

The structure of [Ph
PNPPh
][(MeSO
N] (monoclinic, P2
/c, Z ' = 1; single-crystal X-ray diffraction at −140 °C) displays chains of relatively small anions, surrounded by four parallel columns of bulky cations, giving a rectangular array. In contrast to a previously reported series of onium dimesylamides with smaller cations, interanion hydrogen bonding C
-H· · · O, originating from the inductively activated methyl groups, is not observed in the present structure. In consequence, the packing arrangement is determined by multiple phenyl embraces between cations, weak cation-anion hydrogen bonds C
-H· · ·O/N and, most notably, by methyl-phenyl CH/π interactions between anions and cations. One methyl group forms two C-H· · ·π contacts to different phenyl rings (hydrogen-to-centroid distances: 272 and 285 pm), the other lies in a tripodal mode above an aromatic ring plane (hydrogen-to-centroid distances: ca. 330 pm).