You are seeing a free-to-access but limited selection of the activity Altmetric has collected about this research output.
Click here to find out more.
X Demographics
Mendeley readers
Attention Score in Context
| 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. |
X Demographics
The data shown below were collected from the profiles of 42 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 8 | 19% |
| Japan | 7 | 17% |
| United Kingdom | 4 | 10% |
| Norway | 1 | 2% |
| Equatorial Guinea | 1 | 2% |
| Australia | 1 | 2% |
| Canada | 1 | 2% |
| Mexico | 1 | 2% |
| Greece | 1 | 2% |
| Other | 0 | 0% |
| Unknown | 17 | 40% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 27 | 64% |
| Scientists | 15 | 36% |
Mendeley readers
The data shown below were compiled from readership statistics for 155 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 3% |
| Germany | 2 | 1% |
| France | 2 | 1% |
| Switzerland | 1 | <1% |
| Unknown | 145 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 45 | 29% |
| Researcher | 22 | 14% |
| Student > Bachelor | 18 | 12% |
| Student > Master | 16 | 10% |
| Professor | 13 | 8% |
| Other | 24 | 15% |
| Unknown | 17 | 11% |
| Readers by discipline | Count | As % |
|---|---|---|
| Chemistry | 107 | 69% |
| Biochemistry, Genetics and Molecular Biology | 5 | 3% |
| Agricultural and Biological Sciences | 5 | 3% |
| Physics and Astronomy | 3 | 2% |
| Chemical Engineering | 3 | 2% |
| Other | 12 | 8% |
| Unknown | 20 | 13% |
Attention Score in Context
This research output has an Altmetric Attention Score of 116. 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 28 December 2022.
All research outputs
#352,042
of 25,069,047 outputs
Outputs from Science
#8,915
of 80,501 outputs
Outputs of similar age
#2,339
of 200,172 outputs
Outputs of similar age from Science
#98
of 868 outputs
Altmetric has tracked 25,069,047 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 80,501 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 65.1. This one has done well, scoring higher than 88% 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 200,172 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 868 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 88% of its contemporaries.