X-Ray Crystal Structure of the 2-Phenyladamant-2-yl Cation

✍ Scribed by Thomas Laube; Sandro Hollenstein

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: German
• Weight: 626 KB
• Volume: 77
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19940770709

✦ Synopsis

Abstract

The crystal structure of the Sb~2~F~11~ salt of the 2‐phenyladamant‐2‐yl cation, 1 · Sb~2~F~11~, was determined at 183 K (__P__2~1~/c, __R__1 = 0.0652, σ(CC) = 0.02 Å), because earlier published results indicated a charge delocalization from the cationic C(2) into the σ framework (CC hyperconjugation) and a bending of the C(2) bridge. In the structure of 1, a displacement of the C(2) bridge by 7.8(12)° from the symmetrical position and CC bond‐length deviations from expectation values were found which are in agreement with preferential CC hyperconjugation on one face of C(2). The interactions of 1 with two Sb~2~F~11~ counterions nearest to C(2) also indicate different behaviour of the two faces of C(2). The benzylic resonance in 1 is confirmed.