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  • Chromium complexes  (2)
  • Metallophosphaalkenes  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1963-1968 
    ISSN: 0009-2940
    Schlagwort(e): Diphosphapropenes ; CH insertion ; Diphosphiranes ; Chromium complexes ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Rearrangements of the Metallodiphosphapropenes (η5-C5Me5)(CO)2FeP(SiMe3  -  P = C(R)(SiMe3) (R = SiMe3, Ph)Heating of a methylcyclohexane solution of (η5-C5Me5)-(CO)2FeP(SiMe3)  -  P = C(SiMe3)2 (1a) gives rise to the insertion of the P = C moiety into the CH bond of a ring methyl group with formation of the chelate complex η5-ηC5Me4CH2P-[CH(SiMe3)2]P(SiMe3)Fe(CO)2 (2) which is converted into the pentacarbonylchromium derivative [5-C5Me4CH2P[CH-(SiMe3)2]P(SiMe3)[Cr(CO)5]Fe(CO)2] (3). In contrast, a similar treatment of (5-C5Me5)(CO)2FeP(SiMe3)  -  P = C(Ph)(SiMe3) (1 b) furnishes the diphosphirane (5-C5Me5)(CO)2FeP  -  C(Ph)-SiMe3)  -  P (SiMe3) (5). By chromatography of its (CO)5Cr adduct 6, the P  -  Si bond is hydrolyzed to give the (diphosphirane)-chromium complex [(5-C5Me5)(CO)2FeP-C(Ph)(SiMe3)P(H)]-Cr(CO)5 (8). The molecular structures of 3 and 8 are determined by single-crystal X-ray analysis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1553-1557 
    ISSN: 0009-2940
    Schlagwort(e): Phosphido complexes ; Phosphaalkenes ; Diphosphiranes ; Chromium complexes ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Transition-Metal-Substituted Diphosphenes, XXVII[1]. - Synthesis and Structure of the Diphosphirane (η5-C5Me5)(CO)2Fe-PH[Cr(CO)5(η5-C5Me5)(CO)2FePH2 (5), prepared from (η5-C5Me5)(CO)2Fe-P(SiMe3)2 and ethanol, reacts with one equivalent of ClP = C(SiMe3)2 to give the diphosphirane (η5-C5Me5)(CO)2FePH (8). Compound 8 is converted into the iron chromium complex [(η5-C5Me5)(CO)2Fe-H]Cr(CO)5(9). In contrast, the reaction of 5 with two equivalents of ClP=C(SiMe3)2 results in the formation of the cyclotri-phosphane [(η5-C5Me5)(CO)2Fe-[CH(SiMe3)2] (12). The molecular structure of 9 is elucidated by single-crystal X-ray analysis.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 0044-2313
    Schlagwort(e): Metallophosphaalkenes ; Transition Metal Complexes ; X-Ray Structure Analysis ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Transition-Metal Substituted Phosphaalkenes and Acyl Phosphanes. 31 [1] Reactivity of (η5-C5Me5)(CO)2FeP = C(NMe2)2 towards Tin Dichloride. X-Ray Structure Analysis of {(η5-C5Me5)[η1-(Me2N)2C = P—P = C(NMe2)2](CO)2Fe}+{[Me2N)2C]2P}+(FeCl4)2-Reaction of metallophosphaalkene (η5-C5Me5)(CO)2 · FeP = C(NMe2)2 (1) with anhydrous tin dichloride affords the salt-like compound {(η5-C5Me5)[η1-(Me2N)2C = P—P = C(NMe2)2] · (CO)2Fe}+{[(Me2N)2C]2P}+(FeCl4)2- 5 which is characterized by single crystal X-ray analysis and spectra (IR, 1H, 31P-NMR).
    Notizen: Die Reaktion des Metallophosphaalkens (η5-C5Me5(CO)2FeP = C(NMe2) 2 (1) mit wasserfreiem Zinndichlorid liefert die salzartige Verbindung {(η5-C5Me5)[η1-(Me2N)2 · C = P—P = C(NMe2)2](CO)2Fe}+{[(Me2N)2C]2P}+(FeCl4)2-5, die durch Einkristall-Röntgenstrukturanalyse und Spektren (IR, 1H, 31P-NMR) charakterisiert wird.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 35 (1996), S. 271-288 
    ISSN: 0570-0833
    Schlagwort(e): metallophosphaalkenes ; phosphaalkenes ; transition metal compounds ; Metallophosphaalkenes ; Phosphaalkenes ; Transition metals ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The chemistry of low-valent organophosphorus compounds such as phosphaalkenes and phosphaalkynes has undergone rapid development in the last two decades. This development also includes the coordination chemistry of these species, which can act as versatile ligands in metal complexes. Metallophosphaalkenes are compounds in which one or more of the organic substituents on the P=C unit is replaced by a transition metal complex fragment. Metallophosphaalkenes have emerged from an existence as laboratory curiosities to become a link between main group and organometallic complex chemistry. The great richness of their chemistry not only mirrors the specific properties of the individual building block, but also shows novel and individual traits. Particular examples are cycloadditions of these electron-rich heteroalkenes with electron-deficient alkenes, alkynes, azo, and diazo compounds. These often lead to novel types of reaction and compounds. Metallophosphaalkenes are also important as intermediates in all metal-assisted cyclooligomerizations of phosphaalkynes.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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