# Metal Ion Coordination Chemistry in HADDOCK

**URL:** <https://ask.bioexcel.eu/t/metal-ion-coordination-chemistry-in-haddock/121>\
**Category:** HADDOCK\
**Created:** [June 8, 2016, 7:41pm UTC](https://ask.bioexcel.eu/t/metal-ion-coordination-chemistry-in-haddock/121 "2016-06-08T19:41:39Z")\
**Posts on this page:** 1\
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**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [June 9, 2016, 7:19am UTC](https://ask.bioexcel.eu/t/metal-ion-coordination-chemistry-in-haddock/121/3 "2016-06-09T07:19:23Z")

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There is indeed no directionality in ion interactions that would ensure that the coordination geometry is conserved. So if you want to ensure it, define additional distance restraints between both the coordinating atoms and your ion, but also between the coordinating atoms.

See also

- [dealing with elemental ions](https://ask.bioexcel.eu/t/dealing-with-elemental-ions/102)
- [zinc finger protein](https://ask.bioexcel.eu/t/zinc-finger-protein/76)

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