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  • 1
    ISSN: 0009-2940
    Keywords: cis-Stannyl-boryl-alkenes ; Sulfur diimide anions ; Multinuclear NMR ; 1,2,5-Azastannaboratoles ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of 1,2,5-Azastannaborole Derivatives from Sulfur Diimide Anions and cis-Stannyl-boryl-alkenes - X-ray Crystallographic Study of Two 2,5-Dihydro-1-(imino-λ4-sulfanylidene)-1,2,5-azastannaboratoles(E)-3-(Diethylboryl)-2-(chlorodimethylstannyl)-2-pentene (1) reacts with the sulfur diimide anions 3 [R - NSN-K+, R=tBu (a), Me3Si (b), tBu2P (c)] in a 1:1 ratio, and with 4 (K+;-NSN-K+) in a 2:1 ratio, to give various heterocycles. The first products of the reaction between 1 and 3 [2,5-dihydro-1-(imino-λ4-sulfanylidene)-1,2,5-azastannaboratoles 5a, b, c] are isolated at -30°C and characterized by X-ray crystallography. The compounds 5a,b rearrange into the borole derivates 6a,b (with an additional N—Sn coordination) by transfer of an ethyl group from the boron to the sulfur atom. Ethylene is eliminated from compound 6a (not 6b) to give the diaminosulfane derivative 7a. The 2:1 reaction between 1 and 4 affords an unstable intermediate 8 with a fluxional structure, leading to 9 in which an EtS moiety bridges a borole ring (analogous to 6 but without the additional N - Sn coordination) and a boratole ring (analogous to 5). All compounds are characterized by 1H-, 11B-, 13C-, 15N- (in part), 29Si- and 119Sn-NMR spectra.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 612 (1992), S. 56-62 
    ISSN: 0044-2313
    Keywords: 1λ5,3λ5-diphosphete ; addition compounds with GeCl2, SnCl2, (CO)5W(Z-cyclooctene) ; n.m.r., i.r., mass spectra ; X-ray structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphete as Ligand in Coordination Compounds1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphete, 1, reacts with GeCl2 · 1,4-dioxane, SnCl2, and (CO)5W(Z-cyclooctene) to give the complexes {HCP[N(CH3)2]2}2 · GeCl2, 3, {HCP[N(CH3)2]2}2 · SnCl2, 4, and {HCP[N(CH3)2]2}2 · W(CO)5, 5, respectively. The n.m.r., mass, and i.r. spectra of the new compounds as well as the crystal and molecular structures of 3 and 4 are reported and the bonding situation in compounds 3-5 is discussed.
    Notes: 1,1,3,3-Tetrakis(dimethylamino)-1λ5,3λ5-diphosphet, 1 bildet mit GeCl2 · 1,4-Dioxan, SnCl2 bzw. (CO)5W(Z-cycloocten) die komplexe {HCP[N(CH3)2]2}2 · GeCl2, 3, {HCP[N(CH3)2]2}2 · SnCl2, 4, bzw. {HCP[N(CH3)2]2}2 · W(CO)5, 5. Die NMR-, Massen- und IR-Spektren der neuen Verbindungen sowie die Kristall- und Molekülstruktur von 3 und 4 werden mitgeteilt und die Bindungsverhältnisse in den Verbindungen 3-5 diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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