Regarding metal carbonyls, correct statements are

A) Oxidation state of metal is zero

B) Carbon-Oxygen bond has pure triple bond character

C) Metal-Carbon bond has pure single bond character

D) Metal atom can not only act like electron pair acceptor but also act like electron pair donor

detailed solution

Correct option is A

A) Oxidation state of metal is zero…..trueB) Carbon-Oxygen bond has pure triple bond character….falseC) Metal-Carbon bond has pure single bond character….falseD) Metal atom can not only acts like electron pair acceptor but also acts like electron pair donar….trueCarbon atom of carbonyl group donates electron pair to metal atom to form a sigma bond;Metal atom donates electron pair to π*antibonding molecular orbital of carbonyl group to form a pi bond;Thus M-C bond has both single and double bond character;Carbon-Oxygen bond will not be pure triple bond but it will have both triple bond and double bond character;