Need help with hybridization question URGENT!!!

[sam26880]

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what's the hybridization of each carbon in the figure below? And why are the 2 of the hydrogens flat and the other 2 are not?

 

[busdent]

what's the hybridization of each carbon in the figure below? And why are the 2 of the hydrogens flat and the other 2 are not?

from left to right: SP2, SP, SP2

 

[cdmOMR]

what's the hybridization of each carbon in the figure below? And why are the 2 of the hydrogens flat and the other 2 are not?

I think they should be all be flat...with 120* bond angles they should be trigonal planar and the whole molecule in one plane. Unless this is some exception that they show later on in Orgo.

 

[dudewhensmydat]

from left to right: SP2, SP, SP2

Are you sure they're not all sp2; i thought sp is only for triple bonds (2 sigma and 2 pi)?

thanks.

😱

 

[busdent]

Are you sure they're not all sp2; i thought sp is only for triple bonds (2 sigma and 2 pi)?

thanks.

😱

SP has two pie bonds. the carbon in the middle has two pie bonds.

 

[in her drawer]

Are you sure they're not all sp2; i thought sp is only for triple bonds (2 sigma and 2 pi)?

thanks.

😱

Busdent has got it.

 

[busdent]

I think they should be all be flat...with 120* bond angles they should be trigonal planar and the whole molecule in one plane. Unless this is some exception that they show later on in Orgo.

the two carbons on the sides are trigonal planar with 120 deg. angles. The carbon in the middle is Linear with 180 deg angle.

 

[dudewhensmydat]

SP has two pie bonds. the carbon in the middle has two pie bonds.

You're right - I'm wrong.

 

[sam26880]

from left to right: SP2, SP, SP2

ok..but what is the reason why 2 hydrogens are flat and the other 2 are not?

 

[deleted100801]

they are flat, just in a different plane compared to the other two h's

 

[sam26880]

they are flat, just in a different plane compared to the other two h's

that's what my question is..what is the reason those 2 H's are in a different plane

 

[cdmOMR]

I think every thing should be in one plane because there is no tetrahedral structures...Id like to know why also if they are not in the same plane.

 

[gijohn529]

The reason why hybridization of the H2C=C=CH2 is not flat is due to where the pi bonds bond. One of the double bonds runs parallel to the paper while the other runs into and out of the paper. Let's imagine the XYZ grid. The X line will hook up to s bonds to each carbon. The reason is because once the pi bond is created on the lone carbon in the y axis, the extra pi bond location can run in the only in the z axis which twist the other CH2 90 degrees. If my explanation wasn't suffice, hopefully my picture will help