Warm Up # 8 Draw the following, label the number of sigma bonds and pi bonds for each: H30+1 HCN SCN-1 Look at SCN-1. There are actually two correct.

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Presentation transcript:

Warm Up # 8 Draw the following, label the number of sigma bonds and pi bonds for each: H30+1 HCN SCN-1 Look at SCN-1. There are actually two correct ways you could draw it. Try to figure out both ways.

Octet Exceptions and Partial Positive/Negatives

Octet Exceptions: Phosphorus and Sulfur Phosphorus = 5 valence CAN HAVE 5 bonds Ex. PCl5 or PO4-3 Sulfur = 6 valence CAN HAVE 6 bonds Ex. SF6 or SO4-2 NOT TRUE FOR NITROGEN OR OXYGEN

Resonance Structures Resonance Structures – same compound, different bond combinations Ex. SCN-1, CO3-2, etc. Show the combos. With two-sided arrow

Partial Positives/Negatives Ex. N2O To bond: Nitrogen loses e- (+1) Oxygen gains e- (-1) Collectively: NEUTRAL Ex. NO3-1, SO3-2,

Steps when Bonding 1. Connect dots with single bonds first 2. Double/Triple bonds if necessary 3. Add electrons to outside atoms if necessary (- charge) 4. Take electrons away from central atom first (+ charge), THEN add e- to outside atoms