One-dimensionally linked Chain Crown Ether Complexes. Syntheses and Crystal Structures of Complexes [K(18-Crown-6)]2[M(SeCN)4](H2O) (M = Pd, Pt)

2005 ◽  
Vol 631 (1) ◽  
pp. 178-181 ◽  
Author(s):  
Da-Cheng Li ◽  
Mao-Xi Du ◽  
Jian-Min Dou ◽  
Da-Qi Wang
Keyword(s):  
Crown Ether ◽  
Crystal Structures ◽  
Crown Ether Complexes

Crown Ether Complexes of Sulfonium Salts—The X-Ray Crystal Structures of[PhCOCH2SMe2·[18]Crown-6]n[PF6]n and[(PhCOCHPhSMe2)2·[18]Crown-6][PF6]2

1984 ◽  
Vol 23 (12) ◽  
pp. 977-979 ◽  
Author(s):  
Billy L. Allwood ◽  
John Crosby ◽  
David A. Pears ◽  
J. Fraser Stoddart ◽  
David J. Williams
Keyword(s):  
Crown Ether ◽  
Crystal Structures ◽  
Sulfonium Salts ◽  
X Ray ◽  
Crown Ether Complexes

Crown ether complexes exhibiting unusual 1:2 macrocycle salt ratios: X-ray crystal structures of cyclohexano-15-crown-5•2LiOPh, cyclohexano-15-crown-5•2NaOPh, and 15-crown-5•2NaOPh

1991 ◽  
Vol 69 (4) ◽  
pp. 687-695 ◽  
Author(s):  
Kimberly A. Watson ◽  
Suzanne Fortier ◽  
Michael P. Murchie ◽  
John W. Bovenkamp
Keyword(s):  
Crown Ether ◽  
Alkali Metal ◽  
Crystal Structures ◽  
Direct Methods ◽  
The Other ◽  
Space Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
Host Guest Complex ◽  
Crown Ether Complexes

The crystal structures of three crown ether complexes (cyclohexano-15•crown-5•2LiOPh (1): Li2O7C26H36, Mr = 474.45, λ(CuKα)filt. = 1.5418 Å; cyclohexano-15-crown-5•2NaOPh (2): Na2O7C26H36, Mr = 504.54, λ(CuKα)filt. = 1.5418 Å; and 15-crown-5•2NaOPh (3): Na2O7C22H30, Mr = 452.46, λ(CuKα)mono. = 1.5418 Å) have been determined by X-ray diffraction at room temperature (T = 298 K). Complex 1 crystallizes in space group P21/n with a = 15.032(5), b = 13.332(2), c = 13.533(3) Å, β = 106.28(2)°, V = 2603.2 Å3, and Z = 4. Complex 2 crystallizes in space group P21/n with a = 15.94(1), b = 12.194(7), c = 14.068(7) Å, β = 102.84(5)°, V = 2666.3 Å3, and Z = 4. Complex 3 crystallizes in space group P21/c with a = 12.451(3), b = 17.263(3), c = 12.659(6) Å, β = 115.74(3)°, V = 2450.8 Å3, and Z = 4. The three structures were solved by direct methods and refined by full-matrix least-squares calculations to residuals, R, of 0.080, 0.069, and 0.081 for complexes 1, 2, and 3, respectively. In each structure the macrocycle forms a 1:2 host–guest complex with the alkali metal. Each structure exhibits a dimer of the general form (MAC•2MOPh)2 where M = Li+ and Na+ for structures 1 and 2, respectively, and MAC = cyclohexano-15-crown-5, while M = Na+ and MAC = 15-crown-5 for structure 3. In each case the two metals of the monomeric unit have different crystallographic and chemical environments. In structures 1 and 3 one alkali metal is coordinated to all five oxygens of the macrocycle and to one of the phenoxide oxygens, while the other alkali metal is coordinated to only one oxygen of the macrocycle and to three phenoxide oxygens. In structure 2, one alkali metal is coordinated to only four of the five oxygens of the macrocycle and to two of the phenoxide oxygens, while the other alkali metal is coordinated to only one oxygen of the macrocycle and to three phenoxide oxygens (as in 1 and 3). Key words: crown ether, host–guest complexes, X-ray crystallography.

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