ISSN:
1572-8854
Keywords:
Inclusion complexes
;
antimony fluoride
;
crown ethers
;
X-ray
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract Four crystalline molecular complexes between antimony(III) fluoride and 18-membered crown ethers have been obtained and their structures investigated by single crystal X-ray diffraction techniques: [18-crown-6·SbF3], C12H24F3O6Sb,P212121,a=8.328(4),b=11.573(4),c=18.094(4)Å,V=1744(1)Å3,Z=4; [benzo-18-crown-6·SbF3], C16H24F3O6Sb,P21/n,a=10.490(2),b=13.714(1),c=13.442(2)Å, β=101.94(1)°,V=1892(1)Å3,Z=4; [cis-syn-cis-dicyclohexano-18-crown-6·SbF3·CH3OH], C21H40F3O7Sb,P21/n,a=8.270(4),b=23.386(3),c=12.772(1)Å, β=96.31(2)°,V=2455(1)Å3,Z=4; [cis-anti-cis-dicyclohexano-18-crown-6·SbF3], C20H36F3O6Sb,Pna21,a=21.091(8),b=12.829(5),c=8.437(3)Å,V=2283(2)Å3,Z=4. All species are the perching-type complexes with the antimony fluoride above the cavity and the metal lone pair pointed toward the center of the crown ring. The antimony atom interacts with all six crown oxygen atoms with Sb−O distances of 2.837(2)–3.344(2) Å. The antimony atom is displaced from the least square plane of the crown oxygen atoms at the distances of 1.288–1.383 Å.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01670315
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