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Select the correct statement for overlap...

Select the correct statement for overlapping of atomic orbitals :
(I) `2p_(x) + 2p_(x)` (II) `2p_(x) + 2p_(y)` (iii) `2p_(z) + 2s`

A

If inter nuclear axis is x, then (II) combination forms `sigma`-bond

B

If inter nuclear axis is z, then (I) combination forms `pi`-bond

C

If inter nuclear axis is y, then (II) combiantion form `pi`-bond

D

If inter nuclear axis is x, (III) combiantion form `pi`-bond

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The correct Answer is:
B
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Label the molecular orbitals formed by the following combinations of atomic orbitals (Assume z - axis as internuclear axis): (i) 2s+2s (ii) 2p_(x)-2p_(x) (iii) 2p_(z)+2p_(z) (iv) 1s-1s (v) 2p_(y)+2p_(y) .

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Molecular orbitals are formed by the overlap of atomic orbitals. Two atomic orbitals combine to form two molecular orbitals called bonding and antibonding MO s . The molecular orbitals are filled with electrons following the same rules as followed for filling of atomic orbitals. The molecular orbitals electronic configurations help us to calculate bond order when which give important information about bond strength and bond length. Considering Z - axis as internuclear axis, which one of the following will be for sigma antibonding MO? (i) 2p_(y)+2p_(y)" "2p_(x)-2p_(y) (iii) 2s+2p_(z)" "(iv) 2p_(z)-2p_(z)

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