First thing: Please be Ready with iclickers out, everything else put away. (Candy/Toothpicks can stay out)

First thing: Please be Ready with iclickers out, everything else put away. (Candy/Toothpicks can stay

out)

For Credit iClicker QuizOpen Note:

You may not use: Phones, books, ipads, computers or your neighbor

• Given the structure of OF2 answer the

following questions:

• 1) What is the coordination number of O?• A) 2 B) 3 C) 4 D) 5 E) 6

• 2) What is the steric number of O?

• A) 2 B) 3 C) 4 D) 5 E) 6

• Visit: https://checkin.ics.uci.edu/

• Log in and select Chem 1A.

• When prompted, type the word of the day: vsepr

• Ensure when asked if you will share your location you select “allow”.

• Visit: https://learningcatalytics.com/

• Sign in MasteringChemistry account name

• When prompted, type session ID: NO LEARNING CATALYTICS

Please turn off all downloads. You can usually pause them by clicking on them and clicking pause. Facebook and youtube are officially banned during class time

(this is not me micromanaging, it’s a legit internet issue as told to me by OIT).

Remember back 5 rows of even side

are no seating zones

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SOME DEFINITIONS• STERIC NUMBER: # BONDS+# ELECTRON PAIRS

• COORDINATION NUMBER: NUMBER OF BONDED ATOMS Steric #: 4

Coord. #:3

Steric #: 5Coord. #:5

Steric #: 6Coord. #:5

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SOME (MORE) DEFINITIONS• ELECTRON GEOMETRY: GEOMETRY INCLUDING IF YOU “SAW”

ELECTRON PAIRS

• MOLECULAR GEOMETRY: GEOMETRY WHERE YOU DON’T “SEE” ELECTRON PAIRS

• BOND ANGLE: ANGLE BETWEEN BONDS. EG:TetrahedralMG: Trig. pyramidal

EG:OctahedralMG: Square Pyramidal

EG:Trig. bipyramidalMG: Trig. bipyramidal

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PULL OUT YOUR WORKSHEET, CANDY AND TOOTHPICKS!

Thanks to http://www.chemmybear.com/shapes.html for all animations on following slides!

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STERIC NUMBER 2

Linear

Linear

180°

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STERIC NUMBER 3

Examples:SO3, BF3, CO3

2-

Examples:SO2, CCl2

Trigonal Planar

120°

Trigonal Planar

Bent

<120°

Trigonal Planar

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STERIC NUMBER 4

Examples:CH4, SiH4, PO4

Examples:NH3, PI3

Examples:H2O, OF2

Tetrahedral

109.5°

Trigonal Pyramidal

<109.5°

Tetrahedral

Tetrahedral Tetrahedral

Bent

<109.5° and <AX3E

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STERIC NUMBER 5

Examples:PCl5, SbF5

Examples:TeCl4, SF4

Examples:ClF3, SeO3

2-

Examples:I3-, XeF2

Trig. Bipyramidal

90°, 120°

Trig. Bipyramidal

Trig. Bipyramidal Trig. Bipyramidal Trig. Bipyramidal

See-saw

<90°, <120° <90° 180°

T-shaped linear

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STERIC NUMBER 6

Examples:SF6, Mo(CO)6

Examples:IF5, BrF5

Examples:XeF4, ClF4

-

Octahedral

90°

Octahedral Square Pyramidal

<90° 90°

Square planar

Octahedral Octahedral

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