Another Transition Element Structure Given that Osa(CO)12 exists,what is its structure? Osmium:[Xe](6s)2(5d)6-8 valence e By symmetry,there must be 4 CO's attached to every Os. That would give us 8+4(2)=16 e for each Os.But each Os needs 2 more e to make 18.So the Os's can form a triangle, with each Os contributing 2 valence e's to the single bonds: COCO CO CO co 。。 :Os: :Os: CO Os: Os .Os: CO CO CO CO CO CO CO CO CO CO COCO XIV-8Another Transition Element Structure • Given that Os3(CO)12 exists, what is its structure? Osmium: [Xe] (6s)2 (5d)6 → 8 valence e- • By symmetry, there must be 4 COʼs attached to every Os. That would give us 8 + 4(2) = 16 e- for each Os. But each Os needs 2 more e- to make 18. So the Osʼs can form a triangle, with each Os contributing 2 valence e- ʼs to the single bonds: Os Os Os CO CO CO CO CO CO CO CO CO CO CO CO Os Os Os CO CO CO CO CO CO CO CO CO CO CO CO XIV-8