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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 127 (1996), S. 461-468 
    ISSN: 1434-4475
    Keywords: Coordination of As(III) and Sb(III) ; Structure ; Enantiomers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Arsen-tris(2,2-dimethylpropionate) (1) crystallizes monoclinic in the space group P21/n witha=926.2,b=2158.6,c=983.7 pm, β=94.92°, andZ=4. As has a coordination number of 3+3. Antimony tripropionate (2) crystallizes monoclinic in the space group P21/c witha=930.2,b=863.0,c=1575.2 pm, β=90.27, andZ=4. The molecules are bridged to chains; therefore, Sb reaches the coordination number 3+3 (+3).
    Notes: Zusammenfassung Arsen-tris(2,2-dimethylpropionat) (1) kristallisiert monoklin in der Raumgruppe P21/n mita=926.2,b=2158.6,c=983.7 pm, β=94.92° undZ=4. As hat gegenüber O die Koordinationszahl 3+3. Antimontripropionat (2) kristallisiert monoklin in der Raumgruppe P21/c mita=930.2,b=863.0,c=1575.2 pm, β=90.27 undZ=4. Die Moleküle sind intermolekular zu Ketten verknüpft, wodurch Sb die Koordinationszahl 3+3 (+3) erreicht.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1038-1046 
    ISSN: 0044-2313
    Keywords: Binuclear antimony(V) complexes ; structure ; dynamics ; NMR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: d, h-μ-Benzylalkoxophosphonato-e-μ-alkoxo-f-μ-oxo-bis[trichloroantimony(V)] CompoundsThe binuclear antimony(V) complexes Cl3Sb(O)[R3(R1O)PO2](OR2)SbCl3 1 - 6 with R1 = R2 = CH3, C2H5 and R3 = C6H5CH2, (CH3)3C6H2CH2 in solution slowly exchanges the R2 groups between the oxygen atoms of the Sb2O2 ring. The SbOPOSb ringsystem makes rapid pseudorotation. The isomeres are detected by nmr spectroscopy. 1 (R1 = R2 = CH3) crystallizes in the orthorhombic space group Pnma with a = 1247.0, b = 1324.1, c = 1207.9 pm and Z = 4. 2 (R1 = CH3, R2 = C2H5) and 5 (R1 = R2 = CH3, R3 = (CH3)3 · C6H2CH2) crystallizes triclinic in the space group P-1 with a = 984.1, b = 1026.7, c = 1079.9 pm, α = 87.93, β = 75.70, γ = 87.62° and Z = 2 and a = 1164.6, b = 1296.9, c = 1712.9 pm, α = 109.9, β = 96.3, γ = 100.2° and Z = 4 resp., with two crystallographically independent molecules in the asymmetric unit.
    Notes: Die zweikernigen Antimon(V)-Komplexe Cl3Sb(O)[R3(R1O)PO2](OR2)SbCl3 1 bis 6 mit R1 = R2 = CH3, C2H5 und R3 = C6H5CH2, (CH3)3C6H2CH2 tauschen bei RT in Lösung langsam die R2-Gruppen aus. Daneben erfolgt rasches Umklappen des SbOPOSb-quasi-Fünfringes. Die Isomerenbildung wird NMR-spektroskopisch nachgewiesen. 1 (R1 = R2 = CH3) kristallisiert orthorhombisch in der Raumgruppe Pnma mit a = 1247,0, b = 1324,1, c = 1207,9 pm und Z = 4. 2 (R1 = CH3, R2 = C2H5) und 5 (R1 = R2 = CH3, R3 = (CH3)3C6H2CH2) kristallisieren triklin in der Raumgruppe P-1 mit a = 984,1, b = 1026,7, c = 1079,9 pm, α = 87,93, β = 75,70, γ = 87,62° und Z = 2 bzw. a = 1164,6, b = 1296,9, c = 1712,9 pm, α = 109,9, β = 96,3, γ = 100,2° und Z = 4 mit zwei kristallographisch unabhängigen Molekülen in der asymmetrischen Einheit.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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