Virtual Computational Chemistry Laboratory

Software Groups of Indices Contributor


Connectivity indices

Topological molecular descriptors calculated from the vertex degree of the atoms in the H-depleted molecular graph.


RelNo

Symbol

Name

References

1X0connectivity index chi-0

Kier, L.B. & Hall, L.H.,
Molecular Connectivity in
Structure-Activity Analysis.
RSP-Wiley, Chichetser (UK),  
(1986).

2X1connectivity index chi-1 (Randic connectivity index)
3X2connectivity index chi-2
4X3connectivity index chi-3
5X4connectivity index chi-4
6X5connectivity index chi-5
7X0Aaverage connectivity index chi-0
8X1Aaverage connectivity index chi-1
9X2Aaverage connectivity index chi-2
10X3Aaverage connectivity index chi-3
11X4Aaverage connectivity index chi-4
12X5Aaverage connectivity index chi-5
13X0vvalence connectivity index chi-0
14X1vvalence connectivity index chi-1
15X2vvalence connectivity index chi-2
16X3vvalence connectivity index chi-3
17X4vvalence connectivity index chi-4
18X5vvalence connectivity index chi-5
19X0Avaverage valence connectivity index chi-0
20X1Avaverage valence connectivity index chi-1
21X2Avaverage valence connectivity index chi-2
22X3Avaverage valence connectivity index chi-3
23X4Avaverage valence connectivity index chi-4
24X5Avaverage valence connectivity index chi-5
25X0solsolvation connectivity index chi-0
26X1solsolvation connectivity index chi-1
27X2solsolvation connectivity index chi-2
28X3solsolvation connectivity index chi-3
29X4solsolvation connectivity index chi-4
30X5solsolvation connectivity index chi-5
31XMODmodified Randic connectivity index
32RDCHIreciprocal distance Randic-type index
33RDSQreciprocal distance squared Randic-type index
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