2009 O Chem Question (Don't look if you haven't taken yet)

[spdental]

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Hey guys,

Question 80s answer states that the bond angle is 120 degrees. How is this possible? I assumed the carbon was sp3 hybridized, making it 109.5. I understand that resonance could occur, but would this make the bond 120 degrees?

If so, does that mean any carbon next to a double bond is at 120 degrees?

Maybe I'm just making a dumb mistake, but it's bugging me. Also, sorry about the crappy photo quality, my phone broke a week ago and I'm waiting until after my test to fix it (blessing in disguise?)

 

[digzthis]

You're right. That test is riddled with errors. There's an error sheet on here floating around somewhere if you search for it.

 

[ColoradoTeeth]

Here ya go: 2009 DAT sample test errors-confirmed by ADA

 

[spdental]

Here ya go: 2009 DAT sample test errors-confirmed by ADA

Went through that prior to my post. I didn't see it on there.

 

[Wererew]

Hey, the version of the 2009 I found from google #80 looks like this: