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  • 1
    Electronic Resource
    Electronic Resource
    Solution structures of [IrH2(1,5-cyclooctadiene) (bisphosphine)](CF3SO3) complexes. Homo- and heteronuclear long-range couplings from hydride and phosphorus spins to cyclooctadiene protons (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. 677-684 
    Details
    ISSN: 0749-1581
    Keywords: Hydrogenation catalysts ; Indium hydrides ; Chiral phosphines ; 3D Solution structures ; Long-range H,H ; P,H couplings ; NOESY ; 1D-COSY{31P} ; Selective COSY and TOCSY ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The solution structures of the two all-cis stereoisomers of [IrH2(COD)((-)-chiraphos)](CF3SO3) and the four all-cis stereoisomers of [IrH2(COD)((-)-norphos)](CF3SO3) [COD = cycloocta-1,5-diene, (-)-chiraphos = 2S,3S-bis(diphenyl- phosphino)butane, (-)-norphos = 2R,3R-bis(diphenylphosphino)norbornene] were assigned on the basis of various one- and two-dimensional correlation methods. The rationalization of a specifically observed scalar coupling interaction between one of the hydrides and a methylene proton of the cyclooctadiene moiety required an assignment of all the relevant protons including their stereochemical relationship. Analogous long-range coupling pathways were also found for the heteronuclear interactions nJ(P,H) and an interpretation of the origin of these scalar couplings is provided in the form of an expansion of the known geometric dependence of allylic and homoallylic couplings.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260310714
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  • 2
    Electronic Resource
    Electronic Resource
    New Pt … H—N bonds characterized by 15N-filtered and 2D NOESY 1H NMR spectroscopy (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 548-551 
    Details
    ISSN: 0749-1581
    Keywords: NOESY ; 15N-filtered ; Pt-amine complexes ; Cyclometallation ; Pt … H—N interactions ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: New Pt … H—N bonding modes in two cycloplatinated complexes, [Pt(C6H4CH2NMe2-2-C,N)(C6H4CH2NMe2H-2-C,H)Br] (1) and [Pt(1-C10H6NMe2-8-C,N)(1-C10H6NMe2H-8-C,H)Br] (2), were characterized by 15N-filtered and 2D NOESY 1H measurements. Both 1 and 2 show markedly different interactions of an RNMe2H+ group with a platinum centre; the 1J(15N,1H) values of 69 and 59 Hz for 1 and 2, respectively, are considerably less than those of the related free and protonated organic amine systems. The corresponding 1J(195Pt,1H) values are 72 and 180 Hz, respectively. An approach both to understanding and recognizing these Pt … H—N interactions is presented.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260300616
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  • 3
    Electronic Resource
    Electronic Resource
    Selective restricted phenyl rotation in an η3-Ph2C—CH—CHPh allyl sparteine complex of Pd(II). Variable-temperature 13C and multinuclear exchange spectroscopy (1994)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 32 (1994), S. 297-302 
    Details
    ISSN: 0749-1581
    Keywords: 13C NMR ; 2-D exchange ; NOESY ; Restricted rotation ; Pd(II) π-allyl complex ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Variable-temperature studies in addition to 2D exchange and NOE measurements on the chiral allyl complex [Pd(η3-Ph2C—CH—CHPh){(-)-sparteine}] [PF6] have revealed that there is restricted rotation about the ipso-C—allyl-C bonds for the three Ph groups of the η3-Ph2C—CH—CHPh ligand, with that for the anti Ph group having a much higher activation energy. Possible consequences for the reaction chemistry of 1,1-diphenylallyl complexes due to the close proximity of this anti Ph to the chiral bidentate nitrogen ligand are discussed. Detailed 13C and 1H assignments, based on NOESY, TOCSY and C,H correlation measurements, are given.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260320508
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