Subject: parameters for conjuagation.

From: liaoyi_at_u.washington.edu
Date: Fri, 24 Sep 2004 13:10:40 -0700 (PDT)

Dear Sirs: I have general question for you. When we talk about conjugated systems, we can have some general sense about which molecule has better conjugation. For example, a planar structure is better than a twisted one, double bond is better than triple bond, etc. I wonder if there are some sort of parameters that can be used to at least qualitively characterize the conjugation or how easy electron density flows through a bridge.
Thanks.
  Yi