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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 1H-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°C with splitting of each peak at lower temperatures, corresponding to ΔG* of rotation of 8.3 Kcal mol -1. Also, coalescence was also observed for 1,1',3,3'-tetra-tert-butylferrocene and a corresponding ΔG* = 13.1 Kcal mol -1 was obtained.

Authors:
 [1];  [1]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1090444
Report Number(s):
LBL-11722
Journal ID: ISSN 0002-7863
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 103; Journal Issue: 12; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Luke, Wayne D., and Streitwieser, Jr., Andrew. 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, Wayne D., & Streitwieser, Jr., Andrew. 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, Wayne D., and Streitwieser, Jr., Andrew. Mon . "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. https://www.osti.gov/servlets/purl/1090444.
@article{osti_1090444,
title = {Barriers to ring rotation in 1,1',4,4'-tetra-tert-butyluranocene and 1,1',3,3'-tetra-tert-butylferrocene},
author = {Luke, Wayne D. and Streitwieser, Jr., Andrew},
abstractNote = {The 1H-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°C with splitting of each peak at lower temperatures, corresponding to ΔG* of rotation of 8.3 Kcal mol-1. Also, coalescence was also observed for 1,1',3,3'-tetra-tert-butylferrocene and a corresponding ΔG* = 13.1 Kcal mol-1 was obtained.},
doi = {10.1021/ja00402a001},
url = {https://www.osti.gov/biblio/1090444}, journal = {Journal of the American Chemical Society},
issn = {0002-7863},
number = 12,
volume = 103,
place = {United States},
year = {1981},
month = {6}
}