Bridged ferrocenes—IX

Lumbroso, H.; Pigenet, Claude; Lentzner, H.L.; Watts, William E.

doi:10.1016/0040-4020(72)80061-9

Cited by 17 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A more exacting test of the model under investigation would be to monitor the effect upon bonded protons independent of the aromatic framework, yet still within the field of influence of the ferrocenyl nucleus. A suitable choice is the ferrocenophane class of compounds, specifically one where the substituents did not involve a bridge between both of the ferrocene rings due to the observed tilt of the rings imposed by the bridge, 48 which would presumably invalidate the use of the proposed carbon tensor values. To this end the 2,2dimethyl(1,2)ferrocenophane molecule 44 was chosen, where a 3-carbon bridge traverses two adjacent ring carbons on the one ring with the midpoint bridge carbon being permethylated (see Fig.…”

Section: 2-dimethyl(12)ferrocenophanementioning

confidence: 99%

The aromaticity of ferrocene and some derivatives, ruthenocene and dibenzenechromium as determined via ring current assessment and 13C anisotropic contributions to the 1H NMR shielding

Phillips¹,

Separovic

Aroney

2003

New J. Chem.

View full text Add to dashboard Cite

The concept of aromaticity is examined in terms of a delocalised ring current contribution to the proton NMR shielding of ferrocene and related compounds. The source of the ring current is derived as a delocalised contribution to the experimentally determined chemical shift, where the local contribution is calculated from predictions based on the experimental 13 C shielding tensors. Examined are dibenzenechromium, ruthenocene, benzene, hexamethylbenzene and several derivatives of ferrocene with attention to: (i) the effects of complexation of the benzene ring, (ii) the protons in an aliphatic bridge on a ferrocene cyclopentadienyl ring, and (iii) the electric field effects of the permanent electric dipole moment in pentamethylferrocene.

show abstract

Section: 2-dimethyl(12)ferrocenophanementioning

confidence: 99%