There are _____ electron pairs around the central oxygen: _____ bonding pair(s)

Question

There are _____ electron pairs around the central oxygen: _____ bonding pair(s) and _____ nonbonding pair(s). We would expect ________ hybridization of the oxygen.

We would expect a bond angle of approximately _____o between the methyl groups. The molecule _____ a dipole moment.

2.) b) trimethylamine, (CH3)3N

There are _____ electron pairs around the central nitrogen: _____ bonding pair(s) and _____ nonbonding pair(s).
We would expect _________ hybridization of the nitrogen.

We would expect a bond angle of approximately _____o between the methyl groups. The molecule _____ a dipole moment.

3.) c) Trimethylboron, (CH3)3B

There are _____ electron pairs around the central boron: _____ bonding pair(s) and _____ nonbonding pair(s).
We would expect ___________ hybridization of the boron.

We would expect a bond angle of approximately _____o between the methyl groups. The molecule _____ a dipole moment.

4.) d) dimethylberyllium, (CH3)2Be

There are _____ electron pairs around the central beryllium atom: _____ bonding pair(s) and _____ nonbonding pair(s).
We would expect ___________ hybridization of the beryllium.

We would expect a bond angle of approximately _____o between the methyl groups. The molecule _____ a dipole moment.

Explanation / Answer

a) dimethyl ether, (CH3)2O

1) There are ___4_ electron pairs around the central oxygen: __2___ bonding pair(s) and ___2__ nonbonding pair(s). We would expect ___sp3_____ hybridization of the oxygen.

We would expect a bond angle of approximately ___109__o between the methyl groups. The molecule __has___ a dipole moment.

2.) b) trimethylamine, (CH3)3N

There are ___4__ electron pairs around the central nitrogen: __3___ bonding pair(s) and __1___ nonbonding pair(s).
We would expect ____sp3_____ hybridization of the nitrogen.

We would expect a bond angle of approximately __109___o between the methyl groups. The molecule __has___ a dipole moment.

3.) c) Trimethylboron, (CH3)3B

There are ___3__ electron pairs around the central boron: __3___ bonding pair(s) and ___0__ nonbonding pair(s).
We would expect _____sp2______ hybridization of the boron.

We would expect a bond angle of approximately ___120__o between the methyl groups. The molecule __has no__ a dipole moment.

4.) d) dimethylberyllium, (CH3)2Be

There are ___2__ electron pairs around the central beryllium atom: _2____ bonding pair(s) and ___0__ nonbonding pair(s).
We would expect _____sp______ hybridization of the beryllium.

We would expect a bond angle of approximately ___180__o between the methyl groups. The molecule __has no___ a dipole moment.

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