coplanar propane and cyclohexane

• hoay

  6 Apr 18, 00:54

  In both propane and cyclohexane all Carbon atoms are sp3 hybridized. But in cyclohexane not all carbon atoms lie in the sme plane as in propane?

• UltimaOnline

  6 Apr 18, 01:17

  Originally posted by hoay:

  In both propane and cyclohexane all Carbon atoms are sp3 hybridized. But in cyclohexane not all carbon atoms lie in the sme plane as in propane?

  
  Correct.

  3 points of a triangle will always be on the same plane.

• hoay

  6 Apr 18, 01:24

  i want to know why. both are sp3 hybridized. butane will have coplanar carbon also?

• UltimaOnline

  6 Apr 18, 01:49

  Originally posted by hoay:

  i want to know why. both are sp3 hybridized. butane will have coplanar carbon also?

  
  No. Only 2 points (ie. a line) and 3 points (ie. a triangle) will have all points on the same plane.
• hoay

  6 Apr 18, 01:56

  okay. nice summary.

  It means cyclopropane will be coplanar.

  but not cyclobutane and not methylpropane.

• UltimaOnline

  6 Apr 18, 16:15

  Originally posted by hoay:

  okay. nice summary.

  It means cyclopropane will be coplanar.

  but not cyclobutane and not methylpropane.

  
  Considering C atoms only, yes. If include H atoms, none of the molecules are co-planar, due to the C atoms being sp3.
• hoay

  7 Apr 18, 03:35

  Thank you for the additional point.