Using the electroneutrality principle the assumption is made that the Co-N bond will have 50% ionic character and the N-H bond 17% thus resulting in a zero charge on the cobalt atom and a charge of 0.166 on each of the 18 hydrogen atoms.
Using the electroneutrality principle the assumption is made that the Co-N bond will have 50% ionic character thus resulting in a zero charge on the cobalt atom. Due to the difference in electronegativity the N-H bond would 17% ionic character and therefore a charge of 0.166 on each of the 18 hydrogen atoms.