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Novel Synthesis and Activation strategies leading to the formation of tuned mesostructures

Novel Synthesis and Activation strategies leading to the formation of tuned mesostructures. Optimal Sorbent and Catalyst support requirements. A. High adsorption capacity High number of active sites B. High selectivity: * pore volume

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VSEPR Theory

VSEPR Theory. Valence Shell Electron Pair Repulsion. VSEPR Theory. Predicts the molecular shape of a bonded molecule Electrons around the central atom arrange themselves as far apart from each other as possible Unshared pairs of electrons (lone pairs) on the central atom repel the most

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Bonding Part III

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VSEPR

VSEPR. Honors Chemistry. BR + NBR = 2. Linear is only possible shape Two bonding regions (CO 2 ) One bonding region, one nonbonding region (CO). BR + NBR = 3. Trigonal Planar. Bent. BR + NBR = 4. Tetrahedral. Trigonal Pyramidal. Bent. BR + NBR = 5. Trigonal Bipyramidal. See Saw.

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Shapes of Molecules

Shapes of Molecules. All shapes came from http :// www.chemmybear.com. VSEPR theory. Valence shell electron pair repulsion theory Simply stated it says- all atoms and electrons pairs will stay as far apart from one another as possible in 3-D space.

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Linear

Linear. The Red atom is the central atom The Gold atoms are on the outside If there are white spheres, they are representing electron pairs. Trigonal Planar. The Red atom is the central atom The Gold atoms are on the outside If there are white spheres, they are representing electron pairs.

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Shapes of Molecules

Shapes of Molecules. Steric number of 5. Like PF 5 Phosphorus pentafluoride. F F F P F F . Would look like. This is called Trigonal Bipyramidal. Steric # 5 with unbonded pairs of electrons. With one pair of unbonded electrons it is a See-saw shape (SF 4 , IOF 4 )

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