Atomization Energies of the Polymers of Germanium, Ge2 to Ge7

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Abstract
Using information derived from a combination of effusion and mass‐spectrometric techniques at high temperature, the atomization energies and free energies for the reactions Gen(gas)=n(Ge gas) (n=2, 3, 4, 5, 6, 7) have been determined. The values of the energy as obtained from the variation of the free energy of atomization with temperature (second law of thermodynamics method) are in kilocalories per mole: they are 65, 149, 238, 321, 407, and 481 for n of 2, 3, 4, 5, 6, 7, respectively. A comparison of these values with the atomization energies as calculated from the third law of thermodynamics (absolute entropy method) assuming that the geometric configuration of the molecules (n>2) is either a linear chain or a cyclic structure indicates that the former structure is to be preferred. The bond‐dissociation energies (process Gen=Gen−1+Ge) as obtained from the second law are 75, 86, 83, 89, 84, and 65 kcal/mole for n of 7, 6, 5, 4, 3, and 2, respectively.

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