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  • Chemistry  (5)
  • Phosphazanes  (1)
  • aluminium  (1)
  • Wiley-Blackwell  (5)
  • 1995-1999  (5)
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  • Wiley-Blackwell  (5)
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  • 1995-1999  (5)
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  • 1
    ISSN: 0044-2313
    Keywords: Lithium ; imidazole derivatives ; peroxo complexes ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Imidazole Derivatives. XXIV. [Li12O2Cl2(ImN)8(THF)4] · 8 THF: a Peroxo Lithium Fragment in a Novel Cage Structure1,3-dimethyl-2-iminoimidazoline (8, ImNH) reacts with methyl lithium to give [ImNLi]n (9). In tetrahydrofuran, crystals of C56H96Cl2Li12N24O6 · 8 C4H8O (10) are obtained. The structure of 10 consists of a Li12Cl2N8O2 core in which a peroxo unit is incorporated into a stack of ladder fragments. Over all, four tetrahydrofuran and eight imidazoline ligands are attached at the lithium and nitrogen atoms.
    Notes: 1,3-Dimethyl-2-iminoimidazolin (8, ImNH) reagiert mit Methyllithium in Diethylether zu [ImNLi]n (9). In Tetrahydrofuran werden Kristalle von [Li12O2Cl2(ImN)8(THF)4] · 8 THF (10) erhalten. In 10 liegt ein Li12Cl2N8O2-Käfig in Form gestapelter Leiterfragmente mit O22 als zentraler Einheit vor. Hieran sind über die Lithium- und Stickstoffatome insgesamt vier Tetrahydrofuran- und acht Imidazolin-Liganden koordiniert.
    Additional Material: 2 Ill.
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  • 2
    ISSN: 0009-2940
    Keywords: Phosphanes ; Phosphazanes ; Methyleneamine ; Imidazoles ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Imidazole Derivatives, XVII. - Synthesis and Properties of Dichloro(1,3-dimethyl-2-imidazol-2-ylidenimino)phosphane - a Methylenamino Substituent with Uncommon Donor PropertiesDichloro(1,3-dimethyl-2-imidazol-2-ylidenimino)phosphane (5) is obtained from 1,3-dimethyl-2,3-dihydro-2-trimethylsilyliminoimidazole (4) and PCl3 in almost quantitative yield. Strong PN-π interaction (5B) is revealed by its X-ray structure analysis [P(1)-N(1) 1.579(2) Å]. AlCI3 causes chloride abstraction to give the cationic cyclophosphazane 8 identified by NMR spectroscopy.
    Additional Material: 1 Ill.
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  • 3
    ISSN: 0044-2313
    Keywords: Potassium dithiocarbiminate ; dithiolates ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of [ImNCS2K] (ImN = 1,3-Dimethylimidazoline-2-imino): a Novel Potassium DithiocarbiminateThe reaction of the 2-iminoimidazoline 4 with KMe gives the potassium imidate 7 from which the potassium 1,1-dithiolate 8 is obtained in almost quantitative yield. Crystals of C6H8N3S2K · 1/6 CH3CN (8 · 1/6 CH3CN) are triclinic, space group P1, Z = 6, a = 10.988(4), b = 13.597(8), c = 13.622(9) Å, α = 113.003, β = 105.53(3), γ = 105.62(3)°, V = 1636.90 Å3. The structure consists of a complicated 3-dimensional framework in which the K2 units bridged by the four sulfur atoms of two thiolate ligands are connected by nitrogen and sulfur bridges.
    Notes: Die Umsetzung des 2-Iminoimidazolins 4 mit KMe ergibt das Kaliumimidat 7, aus dem das Kalium-1,1-dithiolat 8 in fast quantitativer Ausbeute erhältlich ist. C6H8N3S2K · 1/6 CH3CN (8 · 1/6 CH3CN) kristallisiert triklin, Raumgruppe P1, Z = 6, a = 10.988(4), b = 13.597(8), c = 13.622(9) Å, α = 113.00(3), β = 105.53(3), γ = 105.62(3)°, V = 1636.90 Å3. Die komplexe Raumnetzstruktur besteht aus den durch die 4 Schwefelatome zweier Dithiolat-Liganden verbrückten K2-Einheiten, die ihrerseits über Stickstoff- und Schwefelatome verbunden sind.
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  • 4
    ISSN: 0044-2313
    Keywords: Titanium complexes ; imidazolinimiato complexes ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Imidazole Derivatives. XXII. Imidazoliniminato Complexes of Titanium. Syntheses and X-Ray Structures of [ImNTiCl3]2 and [ImNTiCl3 · 2 MeCN] (ImN = 1,3-Imidazolin-2-imino)1,3-Dimethyl-2-trimethylsilyliminoimidazoline(ImNSiMe3, 7) reacts with TiCl4 in n-pentane to give the dinuclear complex [(ImN)TiCl3]2 (8) which is transferred into the mononuclear compound (ImN)TiCl3 · 2 MeCN (9) on treatment with acetonitrile. The X-ray structure analyses demonstrate the strong donor ability of the imidazoliniminato substituent both in the terminal and bridging coordination mode similar to that of the phosphaniminato group R3PN.
    Notes: 1,3-Dimethyl-2trimethylsilyliminoimidazolin(ImNSiMe3, 7) reagiert mit TiCl4 in n-Pentan zum Zweikernkomplex[(ImN)TiCl3]2 (8), der durch Acetonitril in die einkernige Verbindung [(ImN)TiCl3 · 2 MeCN] (9) überführt wird. Die Kristallstrukturanalyse zeigt die starken Donoreigenschaften der Imidazoliniminato-Gruppe ImN in verbrückender wie endständiger Koordination vergleichbar der des Phosphaniminato-Liganden R3PN.
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  • 5
    ISSN: 0044-2313
    Keywords: Magnesium ; aluminium ; 2-iminoimidazoline complexes ; imidazole derivatives ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Imidazole Derivatives. XXIII. 2-Iminoimidazoline Derivatives of Magnesium and Aluminum1,3-dimethyl-2-iminoimidazoline (7, ImNH) forms with MgI2 the complex [(ImNH)4Mg]I2 (8). Whose X-ray structure analysis implies the presence of NHN bridges in the cation. With MeMgI and n-Bu2Mg the polymeric coordination compounds [(ImN)MgI]n (9) and [(ImN)2Mg]n (10) are formed. 7 and it's trimethylsilyl derivative 12 react with AlMe2Cl to give the ionic complexes [(ImNR)2AlMe2]Cl (11, 13, R = H, SiMe3) which are stable with respect to the formation of imidazol-2-imino complexes. The adduct ImNSiMe3 · AlCl3 (14) accessible from the reaction of 12 and AlCl3 eliminates chlorotrimethylsilane on heating to give the trimeric imino complex [(ImN)AlCl2]3 (15); the X-ray structure of 15 confirms the high π-donor properties of the imino substituent.
    Notes: 1,3-Dimethyl-2-iminoirnidazolin (7, ImNH) bildet mit MgI2 den Komplex [(ImNH)4Mg]I2 (8), dessen Kristallstrukturanalyse das Vorliegen von NHN-Brücken innerhalb des Kations glaubhaft macht. Mit MeMgI und n-Bu2Mg werden die Koordinationspolymeren [(ImN)Mgl]n (9) und [(ImN)2Mg]n (10) gebildet. 7 und dessen Trimethylsilyl-Derivat ImNSiMe3 (12) reagieren mit AlMe2Cl zu den ionischen Komplexen [(ImNR)2AlMe2]Cl (11, 13; R = H, SiMe3), die sich als thermisch stabil bezüglich der Bildung von Imidazol-2-imino-Komplexen erweisen. Das aus 12 und AlCl3 zugängliche Addukt ImNSiMe3 · AlCl3, (14) eliminiert bei thermischer Belastung Chlortrimethylsilan: die strukturanalytische Charakterisierung des trimeren Imino-Komplexes [(ImN)AlCl2]3 (15) belegt die hohe π-Donorkapazität des Imino-Substituenten.
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