Node connection strength in Chemistry Tree.
Each node in Chemistry Tree can be characterized by its mean distance from every other node. Below is a histogram of mean distances for every node in the tree. The final bin includes nodes that are not connected to the main tree. Note also that only individuals whose primary affiliation is this tree are included. Nodes cross-listed from other academic trees are included on their primary tree.

Mean inter-node distance

11251-
9001-
6751-
4500-
2250-

5 6 8 9 10 11 12 13 14 15 16 17 18 19 20+
Mean distance
 Number of nodes 



20 most tightly coupled nodes.
Below are the Chemistry Tree nodes with shortest mean distance.

Rank Mean dist Name Institution Area Date
1 5.43 George M. Whitesides (Info) Harvard University Bio-organic and Biophysical Chemistry 2007-08-06
2 5.63 Robert Howard Grubbs (Info) California Institute of Technology Organic chemistry 2011-07-18
3 5.68 Robert B. Woodward (Info) Harvard University synthetic organic chemistry 2006-09-24
4 5.71 Ronald Charles David Breslow (Info) Columbia University physical organic chemistry 2011-07-18
5 5.92 Robert G. Bergman (Info) University of California, Berkeley mechanisms of organic reactions 2011-08-30
6 6.01 John D. Roberts (Info) California Institute of Technology Physical organic chemistry; applications of NMR spectroscopy to organic chemistry 2011-07-27
7 6.02 Elias James Corey (Info) Harvard University Organic chemistry 2011-07-14
8 6.03 Stephen L. Buchwald (Info) Massachusetts Institute of Technology organometallic chemistry 2011-11-05
9 6.04 Stuart L. Schreiber (Info) Harvard University Chemical biology 2008-12-18
10 6.07 Harry Barkus Gray (Info) California Institute of Technology Bioinorganic chemistry, Electron-transfer chemistry 2011-08-04
11 6.12 James Paddock Collman (Info) Stanford University multi-electron redox reactions in biological systems 2011-07-18
12 6.17 Timothy M. Swager (Info) University of Pennsylvania supramolecular and materials chemistry 2011-11-20
13 6.18 Paul D. Bartlett (Info) Harvard University physical organic chemistry 2010-10-01
14 6.18 Eric N. Jacobsen (Info) Harvard University Mechanistic and synthetic chemistry 2011-11-12
15 6.19 Linus Carl Pauling (Info) California Institute of Technology quantum chemistry and molecular biology 2005-11-10
16 6.22 Mark S. Wrighton (Info) Massachusetts Institute of Technology photochemistry 2011-08-04
17 6.23 Stephen James Lippard (Info) Massachusetts Institute of Technology bioinorganic chemistry 2011-07-21
18 6.23 Christopher B. Gorman (Info) North Carolina State University Organic and Materials Chemistry 2012-03-21
19 6.24 Gilbert Stork (Info) Columbia University synthesis and synthetic methods 2011-07-17
20 6.24 Jerome A. Berson (Info) Yale University Physical Organic Chemistry 2011-08-02


Distribution of individual connectivity.
Another way to look at the Chemistry Tree graph is to plot a histogram of researchers (nodes) based according to the number of immediate connections (edges) they have to other researchers. The final bin includes nodes with 16 or more connections. The actual distribution has a very long tail, with a maximum of 312 connections. Thanks to Adam Snyder for suggesting this analysis!

Edge vs node distribution

58884-
47107-
35330-
23554-
11777-

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16+
Number of connections
 Node count