Indium: bond enthalpies in gaseous diatomic species

The bond energy in the gaseous diatomic species InIn is 100.00 ±8 kJ mol-1.

The following values refer to neutral heterodiatomic molecules in the gas phase. These numbers may well differ considerably from, say, single bond energies in a solid. All values are given in kJ mol-1.

Table of diatomic InX bond enthalpies. All values are quoted in kJ mol-1. Each formula in the table (InO, InF, and so on) is a link - select these to see visual periodicity representations for bond enthalpies involving indium to elements of your choice.

Period 1

InH             InHe

Period 2

InLi InBe InB InC InN InO InF InNe
92.5 ±14.6         < 320.1 ±41.8 506 ±14.6  

Period 3

InNa InMg InAl InSi InP InS InCl InAr
        197.9 ±8.4 289 ±17 439 ±8  

Period 4

InK InCa InGa InGe InAs InSe InBr InKr
        201 247 ±17 414 ±21  

Period 5

InRb InSr InIn InSn InSb InTe InI InXe
    100 ±8   151.9 ±10.5 218 ±17 331  

Period 6

InCs InBa InTl InPb InBi InPo InAt InRn
        153.6 ±1.7      

Period 7

InFr InRa            


I am grateful to Professor J.A. Kerr (University of Birmingham, UK) for the provision of the bond strengths of diatomic molecules data.

The values given here are at 298 K. All values are quoted in kJ mol-1. Generally, these data were obtained by spectroscopic or mass spectrometric means. You should consult reference 1 for further details. A note of caution: the strength of, say, the C-H bond in the gaseous diatomic species CH (not an isolable species) is not necessarily, the same as the strength of a C-H bond in, say, methane.

The strongest bond for a diatomic species is that of carbon monoxide, CO (1076.5 ± 0.4 kJ mol-1). The strongest bond for a homonuclear diatomic species is that of dinitrogen, N2 (945.33 ± 0.59 kJ mol-1).


  1. J.A. Kerr in CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, D.R. Lide, (ed.), CRC Press, Boca Raton, Florida, USA, 81st edition, 2000.

WebElements Shop

WebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, fridge magnets, molecular models, and more.

Periodic Table fridge magnets Periodic Table fridge magnets
Buy our periodic table fridge magnets here

WebElements poster Periodic table t-shirts Periodic table mouse mats Molymod molecular model kits Chemistry educational resources

indium atomic number