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Crystal Structure Determination of the Nonclassical 2-Norbornyl Cation

Overview of attention for article published in Science, July 2013
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (98th percentile)
  • High Attention Score compared to outputs of the same age and source (89th percentile)

Mentioned by

news
7 news outlets
blogs
5 blogs
twitter
46 tweeters
facebook
1 Facebook page
wikipedia
2 Wikipedia pages

Citations

dimensions_citation
78 Dimensions

Readers on

mendeley
125 Mendeley
citeulike
1 CiteULike
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Title
Crystal Structure Determination of the Nonclassical 2-Norbornyl Cation
Published in
Science, July 2013
DOI 10.1126/science.1238849
Pubmed ID
Authors

F. Scholz, D. Himmel, F. W. Heinemann, P. v. R. Schleyer, K. Meyer, I. Krossing

Abstract

After decades of vituperative debate over the classical or nonclassical structure of the 2-norbornyl cation, the long-sought x-ray crystallographic proof of the bridged, nonclassical geometry of this prototype carbonium ion in the solvated [C7H11](+)[Al2Br7](-) • CH2Br2 salt has finally been realized. This achievement required exceptional treatment. Crystals obtained by reacting norbornyl bromide with aluminum tribromide in CH2Br2 undergo a reversible order-disorder phase transition at 86 kelvin due to internal 6,1,2-hydride shifts of the 2-norbornyl cation moiety. Cooling with careful annealing gave a suitably ordered phase. Data collection at 40 kelvin and refinement revealed similar molecular structures of three independent 2-norbornyl cations in the unit cell. All three structures agree very well with quantum chemical calculations at the MP2(FC)/def2-QZVPP level of theory.

Twitter Demographics

The data shown below were collected from the profiles of 46 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 125 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 5 4%
Germany 2 2%
France 2 2%
Switzerland 1 <1%
Unknown 115 92%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 41 33%
Researcher 19 15%
Student > Bachelor 14 11%
Professor 12 10%
Student > Master 12 10%
Other 24 19%
Unknown 3 2%
Readers by discipline Count As %
Chemistry 99 79%
Biochemistry, Genetics and Molecular Biology 5 4%
Agricultural and Biological Sciences 4 3%
Materials Science 2 2%
Medicine and Dentistry 2 2%
Other 8 6%
Unknown 5 4%

Attention Score in Context

This research output has an Altmetric Attention Score of 119. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 21 January 2021.
All research outputs
#203,815
of 17,646,151 outputs
Outputs from Science
#6,788
of 70,771 outputs
Outputs of similar age
#1,705
of 164,366 outputs
Outputs of similar age from Science
#95
of 866 outputs
Altmetric has tracked 17,646,151 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 98th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 70,771 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 55.6. This one has done particularly well, scoring higher than 90% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 164,366 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 98% of its contemporaries.
We're also able to compare this research output to 866 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 89% of its contemporaries.