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Title: Barriers to ring rotation in 1,1',4,4'-tetra-tert-butyluranocene and 1,1',3,3'-tetra-tert-butylferrocene

Abstract

The /sup 1/H NMR spectra of 1,1',4,4'-tetra-tert-butyluranocene show a singlet for the tert-butyl protons and three singlets for the ring protons. Coalescence occurs at -65 to -85/sup 0/C with splitting of each peak at lower temperatures, corresponding to ..delta..G/sup + +/ of rotation of 8.3 kcal mol/sup -1/. Coalescence was also observed for 1,1'3,3'-tetra-tert-butylferrocene and a corresponding ..delta..G/sup + +/ = 13.1 kcal mol/sup -1/ was obtained. 4 figures, 2 tables.

Authors:
;
Publication Date:
Research Org.:
Univ. of California, Berkeley
OSTI Identifier:
6394344
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
J. Am. Chem. Soc.; (United States)
Additional Journal Information:
Journal Volume: 103:12
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; IRON COMPLEXES; ROTATIONAL STATES; URANIUM COMPLEXES; COALESCENCE; EXPERIMENTAL DATA; FERROCENE; LOW TEMPERATURE; NUCLEAR MAGNETIC RESONANCE; TEMPERATURE DEPENDENCE; ACTINIDE COMPLEXES; COMPLEXES; DATA; DIENES; ENERGY LEVELS; EXCITED STATES; HYDROCARBONS; INFORMATION; MAGNETIC RESONANCE; NUMERICAL DATA; ORGANIC COMPOUNDS; POLYENES; RESONANCE; TRANSITION ELEMENT COMPLEXES; 400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials

Citation Formats

Luke, W D, and Streitwieser, A Jr. Barriers to ring rotation in 1,1',4,4'-tetra-tert-butyluranocene and 1,1',3,3'-tetra-tert-butylferrocene. United States: N. p., 1981. Web. doi:10.1021/ja00402a001.
Luke, W D, & Streitwieser, A Jr. Barriers to ring rotation in 1,1',4,4'-tetra-tert-butyluranocene and 1,1',3,3'-tetra-tert-butylferrocene. United States. https://doi.org/10.1021/ja00402a001
Luke, W D, and Streitwieser, A Jr. Wed . "Barriers to ring rotation in 1,1',4,4'-tetra-tert-butyluranocene and 1,1',3,3'-tetra-tert-butylferrocene". United States. https://doi.org/10.1021/ja00402a001.
@article{osti_6394344,
title = {Barriers to ring rotation in 1,1',4,4'-tetra-tert-butyluranocene and 1,1',3,3'-tetra-tert-butylferrocene},
author = {Luke, W D and Streitwieser, A Jr},
abstractNote = {The /sup 1/H NMR spectra of 1,1',4,4'-tetra-tert-butyluranocene show a singlet for the tert-butyl protons and three singlets for the ring protons. Coalescence occurs at -65 to -85/sup 0/C with splitting of each peak at lower temperatures, corresponding to ..delta..G/sup + +/ of rotation of 8.3 kcal mol/sup -1/. Coalescence was also observed for 1,1'3,3'-tetra-tert-butylferrocene and a corresponding ..delta..G/sup + +/ = 13.1 kcal mol/sup -1/ was obtained. 4 figures, 2 tables.},
doi = {10.1021/ja00402a001},
url = {https://www.osti.gov/biblio/6394344}, journal = {J. Am. Chem. Soc.; (United States)},
number = ,
volume = 103:12,
place = {United States},
year = {1981},
month = {6}
}