Question

why bond order decrease in metal carbonyl formation?​

Answer 1

Answer:

Synergic bonding interactions are present in metal carbonyls. The sigma bond is formed when lone pair of electrons of carbonyl carbon is donated to vacant orbital of metal.Due to this the electron density in the bonding pi orbitals of CO decreases and antibonding pi orbitals increases. This decreases the bond order.

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Answer 2

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$<font color= " red">$Synergic bonding interactions are present in metal carbonyls. The sigma bond is formed when lone pair of electrons of carbonyl carbon is donated to vacant orbital of metal. ... Due to this the electron density in the bonding pi orbitals of CO decreases and antibonding pi orbitals increases. This decreases the bond order.$<marquee>♥mark as brainliest..✌♥</marquee>$