Consider the following combination of atomic orbitals :
Combinding orbitals (internuclear axis)
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
(ix)
(x)
Then ca

Question

Consider the following combination of atomic orbitals :
Combinding orbitals (internuclear axis)
(i) $s + p_x (x)$
(ii) $d_{xy} + d_{xy} (x)$
(iii) $d_{yz} + p_z (z)$
(iv) $p_y + p_y (y)$
(v) $d_{yz} + d_{yz} (x)$
(vi) $s + s (z)$
(vii) $d_{z^2} + d_{z^2} (z)$
(viii) $d_{xy} + d_{xy} (z)$
(ix) $p_x + p_x (y)$
(x) $s + p_z (x)$
Then calculate value of "$a^2 + b^2 + 2cd$". (where a = $\sigma$ M.O.; b = $\pi$ M.O.; c = $\delta$ M.O.; d = non-bonding M.O.)

Prashant Kotian · Accepted Answer

Correct answer: 28. Step 1: Determine the geometry of ethyne (C2H2): each carbon is sp hybridized, yielding a symmetric linear structure (H-C≡C-H). Step 2: Analyze the structures of the options: H2O2 is open-book (non-planar), NO2 is bent (sp2 with an odd electron), SnCl2 is bent (sp2 with one lone pair). Step 3: Carbon dioxide (CO2) is sp hybridized and linear (O=C=O). Therefore, C2H2 is isostructural with CO2, matching option (d).

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