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  • 1
    Electronic Resource
    Electronic Resource
    Cholic acid inclusion compounds with ketone guests (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 783-791 
    Details
    ISSN: 1572-8854
    Keywords: Cholic Acid ; Inclusion Compounds ; Ketone Guests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Cholic acid forms inclusion compounds with acetone, methyl ethyl ketone and diethyl ketone. Crystal structures with these closely related guest molecules indicate variations in packing which result in respectively: unusual 2∶3 host: guest stoichiometry and loss of the 21 screw axis, doubling of the c axis with formation of two different channels and the usualP21 structure with 1∶1 host: guest stoichiometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668241
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  • 2
    Electronic Resource
    Electronic Resource
    Inclusion compounds of N,N,N′,N′-tetraisopropylfumaride with isomers of methyl phenol and water (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 495-501 
    Details
    ISSN: 1572-8854
    Keywords: Structural isomers ; enclathration ; inclusion compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structures and thermal analyses of the host compound, N,N,N′,N′-tetraisopropylfumaride, witho-cresol,m-cresol and water are reported and compared to that of thep-cresol complex previously reported in an attempt to elucidate the reasons for host selectivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666726
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  • 3
    Electronic Resource
    Electronic Resource
    Inclusion compounds of N,N,N′,N′-tetracyclohexylfumaride with isomers of cresol and water (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 545-552 
    Details
    ISSN: 1572-8854
    Keywords: Inclusion compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structures and thermal analyses of the host compound, N,N,N′,N′-tetracyclohexylfumaride, witho-cresol,p-cresol and water are reported and compared to that of them-cresol complex previously reported in an attempt to elucidate the reasons for host selectivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666735
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular complexes of sulfonamides. 3. Structure of 5-methoxysulfadiazine (form II) and its 1∶1 complex with acetylsalicylic acid (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 695-701 
    Details
    ISSN: 1572-8854
    Keywords: Molecular complexes ; sulfonamides ; acetylsalicylic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The X-ray structure of the biologically most active polymorph (Form II) of 5-methoxysulfadiazine (1) and that of the 1∶1 complex between this sulfonamide and acetylsalicylic acid (2) are reported. The polymorph1 is monoclinic, space groupP21/c witha=13.086(2) Å,b=5.583(1) Å,c=17.222(3) Å, β=99.98(1)°,Z=4 and occurs as centrosymmetric hydrogen bonded (N−H...N) dimers in the crystal. This arrangement differs from that observed in other polymorphs of the drug. Complex2 is triclinic, $$P\bar 1$$ ,a=8.102(1)Å,b=12.033(1) Å,c=12.170(2) Å, α=111.67(1)°, β=93.77(1)°, γ=103.82(1)°,Z=2. Complexation involves linear intermolecular hydrogen bonds, N−H...O=C and N...O−H, between the amide group and pyrimidinyl N atom of the sulfonamide and the carboxylic group of the acetylsalicylic acid. On complexation to form2, neither molecular component undergoes any major structural change.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668233
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  • 5
    Electronic Resource
    Electronic Resource
    Complexation with diol host compounds. Part 19. Structures and thermal analyses of inclusion compounds oftrans-9,10-dihydroxy-9,10-diphenyl-9,10-dihydroanthracene with dimethylsulphoxide, diethylketone and (±)-2-butanol (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 539-543 
    Details
    ISSN: 1572-8854
    Keywords: Diol host compounds ; trans-9 ; 10-dihydroxy-9 ; 10-diphenyl-9 ; 10-dihydroanthracene ; inclusion compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The structures of the host compoundtrans-9,10-dihydroxy-9,10-diphenyl-9,10-dihydroanthracene with dimethylsulphoxide (1∶2), diethyl ketone (1∶1) and (±)-2-butanol (1∶1) have been elucidated. Each compound is stabilized by O−H...O hydrogen bonds between host and guest, and the guest molecules are disordered in each structure. The thermal decomposition of the compounds shows them to be relatively unstable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666734
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular complexes of sulfonamides. Part 1. 1∶1 complexes between sulfadimidine [4-amino-N-(4,6-dimethyl-2-pyrimidinyl)benzenesulfonamide] and 2- and 4-aminobenzoic acids (1991)
    Springer
    Journal of chemical crystallography 21 (1991), S. 641-648 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structures of the 1∶1 complexes sulfadimidine·2-aminobenzoic acid (I) and sulfadimidine·4-aminobenzoic acid (II) are described and compared with known structures containing sulfadimidine. In each complex, molecular association is maintained by one N-H⋯O hydrogen bond, and one O-H⋯N hydrogen bond involving the imino N and one pyrimidinyl N atom of sulfadimidine and the two carboxyl O atoms of the aromatic acid. The conformation of the sulfadimidine molecule inII is unusual for anN 1-substituted arylsulfonamide. Molecular dimensions for the complexed aminobenzoic acids are virtually the same as those reported for the free acids. Partial correlation between carboxylic acid strengths and the hydrogen bonded N⋯O distances is observed in sulfadimidine complexes of this type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161088
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular complexes of sulfonamides. 2.1:1 complexes between drug molecules: sulfadimidine-acetylsalicylic acid and sulfadimidine-4-aminosalicylic acid (1992)
    Springer
    Journal of chemical crystallography 22 (1992), S. 193-200 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The preparation and crystal structures of the 1:1 complexes sulfadimidine-acetylsalicylic acid (I) and sulfadimidine-4-aminosalicylic acid (II) are described. Each complex unit is maintained by two intermolecular hydrogen bonds, namely N-H⋯O=C and N⋯H-O, involving the N atom of the sulfonamide group and one pyrimidine N atom of the sulfonamide and the carboxylic group of the acid. Molecular parameters for protonated complexed aspirin, as found in I, are reported for the first time and reveal a significantly different conformation from that of the uncomplexed aspirin molecule. The structure of the 4-aminosalicylic acid molecule does not change significantly on complexation with sulfadimidine. Variation in the hydrogen bonded N⋯O distances in these complexes and their analogs is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186256
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  • 8
    Electronic Resource
    Electronic Resource
    Complexation with Diol Host Compounds, 12. Synthesis and Solid-State Inclusion Properties of Bis(diarylhydroxymethyl)1-Substituted 1,1′-Binaphthyls. Crystal Structures of a Host and Its Pyridine Clathrate (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1141-1148 
    Details
    ISSN: 0009-2940
    Keywords: Diol host compounds ; Clathrates ; Crystal structures of host and clathrate ; 1,1′-Binaphthyl derivatives ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of new clathrate host molecules 1 - 8 containing two bis(diarylhydroxymethyl) groups attached to different positions (2,2′ or 8,8′) of a 1,1′-binaphthyl frame have been synthesized. Their clathrate formation properties with organic guests including alcohols, amines, ketones, and other dipolar aprotic compounds or aromatic hydrocarbons are reported (74 examples of clathrates) together with the results of solvent competition experiments for the parent host compound. The inclusion formation and the clathrate stoichiometries depend on the structure of the host molecules in a systematic manner. The crystal structures of the free parent host 1 and its pyridine clathrate (1 : 3) have been determined by X-ray diffraction. The molecular structure of the host is similar in the two species involving an intramolecular hydrogen bond between the host hydroxyls. No other hydrogen bond is involved in the free host case while in the pyridine inclusion compound the second host hydroxyl forms a hydrogen bond with the nitrogen of one pyridine guest which is surrounded by two unbound pyridine species such as to form clusters of three pyridine guests enclosed in the cavities between the host molecules. Thermal analysis corresponds with the two binding states of the pyridine molecules in the clathrate.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260513
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  • 9
    Electronic Resource
    Electronic Resource
    X-ray structure and thermal analysis of a 1∶1 complex between (S)-naproxen and heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin (1994)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 20 (1994), S. 277-290 
    Details
    ISSN: 1573-1111
    Keywords: Permethylatedβ-cyclodextrin ; (S)-naproxen ; inclusion complex ; X-ray crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An inclusion complex between TRIMEB and (S)-naproxen has been crystallised and characterised by physicochemical methods including X-ray analysis. The complex crystallises in the orthorhombic crystal system, space groupP212121, witha=15.179(4),b=21.407(5),c=27.67(1) Å andZ=4. The structure was solved using published coordinates for the skeleton atoms of TRIMEB in an isomorphous complex. Refinement by full-matrix least-squares analysis yieldedR=0.0571 for 6573 unique observed reflections. Hydrophobic forces are responsible for the inclusion of the drug, which has its methoxy group buried in the cavity of the host and its propionic acid moiety protruding from the O(2), O(3) side of the TRIMEB molecule. Both host and guest undergo conformational changes on complexation relative to their conformations observed in the TRIMEB monohydrate and naproxen crystal structures respectively. Complex units pack in a screw-channel mode in a head-to-tail fashion with their axes almost parallel to theb-axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00708773
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  • 10
    Electronic Resource
    Electronic Resource
    X-ray structure and thermal analysis of a 1∶1 complex between sulfathiazole andβ-cyclodextrin (1994)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 17 (1994), S. 187-201 
    Details
    ISSN: 1573-1111
    Keywords: β-Cyclodextrin ; sulfathiazole ; inclusion complex ; crystal structure ; thermal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An inclusion complex with the formula (β-cyclodextrin) (sulfathiazole) 8.3 H2O has been crystallized and characterized by physicochemical methods including single crystal X-ray analysis. The complex crystallizes in the monoclinic system, space group P21, witha=15.264(4),b= 16.500(6),c=15.559(5) Å,β=117.29(3)o andZ=2. The structure was solved using published co-ordinates forβ-cyclodextrin in an isomorphous complex. Refinement by block-diagonal leastsquares yieldedR=0.061 for 4706 unique observed reflections. Inclusion of sulfathiazole produces a slight ellipticity in the host conformation, but the guest adopts a conformation similar to that observed in its polymorphs. The guest is held in the macrocyclic cavity predominantly by hydrophobic forces, with the phenyl ring near the host primary hydroxyl side and the thiazole ring near the secondary hydroxyl side. The complex packs in layers parallel to theac-plane. Layers are linked by hydrogen bonding to water molecules which are located outside the cyclodextrin cavity. An extensive network of hydrogen bonds mediated chiefly by water molecules stabilizes the crystal structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00711858
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