Lewis structures and vsepr 25 the ion s 2 cnch 3 2 has

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Lewis Structures and VSEPR 25. The dimethyldithiocarbamate ion, [S 2 CN(CH 3 ) 2 ] - , has the following skeletal structure: (M 3.1)
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Give the possible resonance structure for this ion. 26. Draw the resonance structure of selenocyanate ion, SeCN - , assign formal charges and select the resonance structure likely to provide the best description for the ion. (M 3.2) 27. Nitric acid which exists as HNO3 molecules in the absence of water, has the skeletal structure shown. Show the important resonance structures of HNO3, and designate the formal charges on each atom. 28. Fill in the table. First column is already answered and will serve as your example. (25 points)
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Total electron domain / Steric Number Electron domain geometry Bonding domain Non- bonding domain Molecular geometry Calculated bond angle/s Example 2 2 0 Linear 180° CO 2 3 3 0 2 1 4 4 0 3 1 2 2 5 5 0 4 1 3 2 2 3 6 6 0 5 1 4 2 7 7 0 8 8 0 70.5°, 99.6°, 109.5° 29. Give the Lewis dot structures and sketch the shapes of the following. First column is already answered and will serve as your example. (Z 3.9-3.11)
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Compound: Lewis dot structure Geometry H 2 O Bent SeCl 4 I 3 - PSCl 3 (P is central) IF 4 - PH 4 - TeF 4 2- N 3 - SeOCl 4 - (Se is central) PH 4 +
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ICl 2 - Phosphorous acid (one H is bounded to P) BH 4 - IO(OH) 5 SOCl 2 NO 2 S 2 O 4 2- (symmetric, with S-S bond) XeO 2 F 2 XeOF 5 -
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