Perfectly Staggered and Twisted Difluoromethylene Groups in Perfluoroalkyl Chains: Structure of M[C 4 F 9 SO 2 NSO 2 C 4 F 9 ] (M  Na, K) | Zendy

Xue Lixin | Zendy; DesMarteau Darryl D. | Zendy; Pennington William T. | Zendy

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Perfectly Staggered and Twisted Difluoromethylene Groups in Perfluoroalkyl Chains: Structure of M[C 4 F 9 SO 2 NSO 2 C 4 F 9 ] (M  Na, K)

Author(s) -

Xue Lixin,

DesMarteau Darryl D.,

Pennington William T.

Publication year - 1997

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.199713311

Subject(s) - counterion , crystallography , chemistry , core (optical fiber) , type (biology) , stereochemistry , ion , materials science , organic chemistry , ecology , biology , composite material

The type of counterion determines whether the perfluoroalkyl chains extending from the hydrophilic core of a layered structure in compounds of the type M[C n F 2 m +1 SO 2 NSO 2 C n F 2 n +1 ] ( n, m = 4, 6) possess an all‐staggered conformation (M = Na) or a more typical helical conformation (M = K; see picture on the right). In the sodium complex the perfluoroalkyl chains are too closely packed to assume a twisted conformation.

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