Hybridization and Sigma and Pi bonds

[ridgehockey29]

Say we have sp2 hybridization of nitrogen, can the unhybridized p orbital form sigma bonds too or can it only form pi bonds? So in the case of nitrogen, it would be able to form molecules with 2 sigma bonds and one pi bond, correct?
Thanks

 

[sjb-2812]

Correct, I think - isn't this just what we have in e.g. oximes, or imines?

 

[DrDu]

It makes no sense to speak of an sp2 hybridized nitrogen atom as something different from e.g. an sp3 hybridized nitrogen or an un-hybridized nitrogen. The concept of hybridization makes sense only in valence bond theory, and even there it is only seldomly necessary.
E.g. the bonds in a molecule like NH3 can equally well be described in terms of sp3 hybrid orbitals or un-hybridized p orbitals.