Question

1. a) Calculate the lowest energy conformer of 2-methylpropane. Use as many calculations as necessary. Then, draw the Newman projection looking down the C1-C2 bond and draw it with 3-D geometry.

b) Calculate the lowest energy conformer of 2-methylbutane. Use as many calculations as necessary. Then, draw the Newman projection looking down the C2-C3 bond and draw it with 3-D geometry.

Answer 1

Please find the lowest energy conformation of both molecules -2-methylpropane.and 2-methylbutane as drawn in the below two images.

Q1. a) 2-methylpropane Ho New man pojection confermatron H n B o - Eclipsed condomachis is high energy & least stable conformation I de Leand contesaation lowest energy conformation.. - it is most stable one 3D Geometry is written as.

DATE b) 2 methylbutane structure CH3 CH 3 4 Newman projection for G Cg band 013 cz - An eclipsed conformation Tu hast stable - high energy. on staggard confomation, it A is most stable and lowest - 43 energy conformatica Geometry is written as 3D 013