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Unformatted text preview: distance. Strong π back donation from F to B which can stabilize the empty p orbital in B. However, because of the longer Al-Cl bond distance, there is less π back donation from Cl to the empty p orbital of Al. Also, Al’s p orbitals are more diffuse, difficult to form π bond. Therefore, the octect rule is achieved through dimerization. (b) B F F F Al Cl Cl Al Cl Cl Cl Cl D 3h D 2h 7. (a) B(OH) 3 (b) H 5 IO 6 (c) [Fe(H 2 O) 6 ] 3+ 8. Oxidation-State Number of valence d electrons Ru 3+ d 5 Co 3+ d 6 Mn 2+ d 5 Rh 1+ d 8 9. NH 2 Fe Cl Cl NH 2 NH 2 NH 2 HN Fe NH 2 Cl HN NH 2 Cl Λ Δ 10. (a) The molecule has 6 such vibration modes (b) + (c) E 1u E 2g A 1g B 1u (d) The A 1g and E 2g normal modes are Raman active while the E 1u normal modes are IR active...
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