# MM4 force field

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The **MM4** force field is related to the older MM2 and MM3 force fields.

## Functional form[edit]

## Parameters[edit]

## References[edit]

- Norman L. Allinger, Kuohsiang Chen, Jenn-Huei Lii "An improved force field (MM4) for saturated hydrocarbons", Journal of Computational Chemistry
**17**pp. 642-668 (1996) - Neysa Nevins, Kuohsiang Chen, Norman L. Allinger "Molecular mechanics (MM4) calculations on alkenes" Journal of Computational Chemistry
**17**pp. 669-694 (1996) - Neysa Nevins, Jenn-Huei Lii, Norman L. Allinger "Molecular mechanics (MM4) calculations on conjugated hydrocarbons", Journal of Computational Chemistry
**17**pp. 695 - 729 (1996) - Neysa Nevins, Norman L. Allinger "Molecular mechanics (MM4) vibrational frequency calculations for alkenes and conjugated hydrocarbons", Journal of Computational Chemistry
**17**pp. (730 - 746 1996) - Norman L. Allinger, Kuohsiang Chen, J. A. Katzenellenbogen, Scott R. Wilson, Gregory M. Anstead "Hyperconjugative effects on carbon - Carbon bond lengths in molecular mechanics (MM4)", Journal of Computational Chemistry
**17**pp. 747 - 755 (1996)