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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 353-360 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of 4-Amino-1-methyl-2-(methylthio)pyrimidinium Chloride - A Model for S-Alkylated 2-ThiocytidineCrystals of 4-amino-1-methyl-2-(methylthio)pyrimidinium chloride (3) are triclinic, space group P1, with two molecules in the asymmetric unit. The structure was solved by direct methods and refined to R = 0.054. The molecules are planar with the S-methyl group in a cis-relationship with the C(2)-N(3)-bond. Bond lengths and angles for the two molecules are equal within standard error limits, and indicate largely aromatic structures. In the crystal matrix, one of the two chloride ions in the asymmetric unit forms three hydrogen-bonds, the other only one.
    Notes: 4-Amino-1-methyl-2-(methylthio)pyrimidinium-chlorid (3) kristallisiert in der triklinen Raumgruppe P1 mit zwei Molekülen in der asymmetrischen Einheit. Die Lösung der Struktur durch direkte Methoden führte nach Verfeinerung zu einem R-Faktor von 0.054. Die Moleküle sind planar mit den S-Methyl-Gruppen in cis-Stellung zur C(2)-N(3)-Bindung. Bindungsabstände und -winkel der beiden Moleküle sind innerhalb der Standardabweichungen gleich und deuten auf weitgehend aromatische Konstitutionen. Im Kristallgitter bildet eines der beiden Chlorid-Ionen in der asymmetrischen Einheit drei, das andere dagegen nur eine Wasserstoffbrücken-bindung aus.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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