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  • 1,2-Diferrocenylbutane (racemic and meso)  (1)
  • 1,3-Diferrocenylpropanes  (1)
  • 1980-1984  (2)
  • 1965-1969
  • 1
    Electronic Resource
    Electronic Resource
    Optisch aktives 1,3-Diferrocenyl-1,3-diphenyl-allen (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 91-104 
    Details
    ISSN: 1434-4475
    Keywords: Chromatographic Resolution on Acetylcellulose ; Circular Dichroism ; 1,3-Diferrocenylbutadienes ; 1,3-Diferrocenylpropanes ; 1,3-Diferrocenylpropenes ; 1,3-Diferrocenylpropenols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The title compound 2 was prepared by thermal dehydration of 1,3-diferrocenyl-1,3-diphenyl-propenol (24) with 70% yield.24 was accessible from 1,3-diferrocenyl-propanedione-1,3 (25) in two steps with 10% overall yield: Treatment of25 with phenyllithium gave 1,3-diferrocenyl-3-phenyl-propenone (8) which after repeated reaction with phenyllithium afforded24. Partial optical resolution of2 was achieved by chromatography on triacetyl cellulose in ethanol, whereby both (+)- and (−)-2 were obtained with different enantiomeric purities as could be deduced from the CD-spectra with Δε-values of +0.18 and −1.64, resp., at 480 nm. Attempts to prepare 1,3-diferrocenyl-allene and 1,3-diferrocenyl-1-phenyl-allene failed. In this context several 1,3-diferrocenyl-propenols,-propenones,-propenes,-propanones,-propanes and-butadienes were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00906246
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  • 2
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von 1,2-Diferrocenylethanen (1982)
    Springer
    Monatshefte für Chemie 113 (1982), S. 767-780 
    Details
    ISSN: 1434-4475
    Keywords: 1,2-Diferrocenylbutane (racemic and meso) ; 1,2-Diferrocenyl-1,2-diphenylethane (racemic and meso) ; Tetraferrocenylethane ; Conformations ; 13C-nmr spectroscopy ; X-ray crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract X-ray crystal structure analyses of stereoisomeric 1,2-dimethyl and diphenyl 1,2-diferrocenyl ethanes (1,2) as well as of 1,1,2,2-tetraferrocenyl ethane (3) showed that racemic (threo) and meso (erythro)2 adopt conformations with antiperiplanar arrangement of the ethane H-atoms (andC 2 andC i symmetry, resp.), whereas1 and3 prefer the synclinal (skew) conformations. In3 the torsional angle between the ethane H-atoms is increased to appr. 90°;3 represents a chiral structure withC 2 symmetry. For the conformation of tetraferrocenyl ethane (3) in solutionC 2 symmetry could be deduced from the13C-nmr. spectra. The conformations of the diferrocenyl ethanes are discussed and compared with those of corresponding alkyl and aryl ethanes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809018
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