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Mercury Hg2+2 ion

by Cesium
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Cesium
#1
Mar15-05, 09:26 PM
P: 274
Mercury can form Hg2+2 and Hg+2 ions. Why does mercury form Hg2+2? Are there any other "diatomic ions" like this? I assume this has to do with atomic size, but why don't zinc and cadmium behave like this? They only form Zn+2 and Cd+2.
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chem_tr
#2
Mar16-05, 05:58 AM
Sci Advisor
PF Gold
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P: 613
Hg+ atom has sp hybrid orbital, so it likes to bond with additional Hg+ ion to form a Hg22+ ion. Copper(I) ions are said to form such bonding, but I am not sure about this. Also some atoms in which organometallic bonding principles are present (like Mn2(CO)10) has Mn-Mn bonding to reach a stable noble gas configuration.


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