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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 283-289 
    ISSN: 0009-2940
    Keywords: Zinc ; Sulfonate ligands ; Perchlorates ; Coordination modes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Attempts are reported to incorporate sulfonate and perchlorate anions as ligands in zinc complexes of tripodal ligands. Using tris(benzimidazolylmethyl)amine (BIMA) only the aqua complexes [ (BIMA)Zn-OH2](RSO3)(ClO4) and [(BIMA)Zn-OH2](RSO3)2(R=CH3, CF3, p-tolyl) were accessible. Using substituted pyrazolylborates (Tp*), the same three sulfonate anions were found to be ligands in the complexes Tp*Zn-OSO2R. Spectroscopic evidence for perchlorate coordination in Tp*ZnClO4 · 2 DMSO conflicts with crystallograpic evidence against it in Tp*ZnClO4 · pyridine. The crystal structures of [(BIMA)Zn-OH2](CH3SO3)2, TpCum,MeZn-OS02CH3, TPtBu,MeZn-OSO2C6H4-p-CH3, and [TpCum,MeZn · NC5H5]ClO4 were determined.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 117-127 
    ISSN: 1434-1948
    Keywords: Zinc ; Aldehyde ligands ; Weakly coordinating anions ; Structural chemistry ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Zinc salts of low or zero water content were obtained from the hexahydrates of zinc nitrate, zinc perchlorate, and zinc tetrafluoroborate by dehydration with triethoxymethane or by solvation with acetonitrile or nitromethane. The compounds incorporated aldehydes as ligands when treated with an excess of the aromatic aldehydes benzaldehyde, mesitylaldehyde, 2-chlorobenzaldehyde, and 4-fluorobenzaldehyde. Eighteen zinc-aldehyde complexes were isolated and identified by crystal structure determinations. All contain octahedral zinc to which 2, 3, 4, 5, or 6 aldehyde ligands are bound. Water, ethanol, and acetonitrile molecules act as coligands. Of the anions employed, BF4- and SbCl6- were found to be only noncoordinating and NO3- only coordinating, whereas complexes with one or two perchlorate ligands were obtained in addition to perchlorate salts.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 129-135 
    ISSN: 1434-1948
    Keywords: Zinc ; Aldehyde ligands ; Halide ligands ; Structural chemistry ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aldehyde complexes of the zinc halides were obtained by treating ZnCl2, ZnBr2, and ZnI2 under anhydrous conditions with large excesses of benzaldehyde and various substituted benzaldehydes. Their constitutions were determined by a total of 12 X-ray structure analyses. Three product types were found: ZnHal2(aldehyde)2 (A), [ZnHal2(aldehyde)]∞ (B), and [Zn(aldehyde)6] [Zn2Hal6] (C). All three dissolve readily in the corresponding aldehyde or in polar nonprotic solvents indicating the presence of solvated zinc species in solution.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 137-144 
    ISSN: 1434-1948
    Keywords: Zinc ; Aldehyde ligands ; N,O Chelate ligands ; Structural chemistry ; Chelates ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reactions of various zinc salts with the chelating aromatic aldehydes pyridine-2-carbaldehyde, 6-methylpyridine-2-carbaldehyde, pyridine-2,6-dicarbaldehyde, and 2-dimethylaminobenzaldehyde were studied. The monoaldehydes and zinc halides yielded the tetrahedral chelate complexes ZnHal2·aldehyde. Pyridine-2-carbaldehyde also formed the octahedral bis-chelate complexes ZnHal2·2 aldehyde. The octahedral tris-chelate complexes [Zn(aldehyde)3]2+ were obtained from [Zn(CH3CN)6](SbCl6)2. Pyridine-2,6-dicarbaldehyde was found to be tridentate in the trigonal-bipyramidal complexes ZnHal2·aldehyde. The structural variability in this system was underlined by the identification of the two unusual complexes [(pyridine-2-carbaldehyde)2(H2O)Zn-Cl-ZnCl3] and [ZnI(pyridine-2-carbaldehyde)2]2[ZnI4].
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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