Mini-Projects

  • important complete all the calculations for part 1 of the lab first!
  • choose your mini-project from those provided or select your own!
  • Exams are approaching, this lab is set up to help you with one of the "hardest parts" of the MOs course, understanding real (and thus complex) MOs.
  • prepared mini-projects:
  • select your own project:
    • To be eligible to choose a project you MUST show Dr Hunt your completed part 1 wiki on Thursday.
    • Your project ideas must be discussed with Dr. Hunt and they must be authorised (a record will be kept).
    • Here are some guidelines for selecting a project. These requirements are for your own benefit, they will save you from starting something too complex for you, or too large for the time available.

Some key instructions! Important

  • Use full basis set 6-31G(d,p) on elements upto the 3rd row and a PP LANL2DZ on atoms beyond this
  • use the desktop computer for your calculations (not the server!)
  • if a job has not converged in 50 steps you MUST get a deomonstrator or lecturer to look at it.
  • for every molecule studied provide a link to the frequency file (NOT the optimisation). Provide the "summary", the "Item" table, the "low frequencies" lines and show that there are no negative frequencies.
  • use your data! at least 50% of the project should be centered around interpretation
  • time management is key, the calculations are quick, analysis is much slower
  • simply reporting your results will only gain you a maximum of 50% of the mark for the project
  • follow as similar pattern of steps from the revision material, the instructions for the mini projects are less developed, because you are now expected to know the processes and you are expected to work with more independence.

Mini project MO analysis

  • all of the mini-projects involve some real MO to LCAO deconstruction
  • here is the kind of thing you should produce
bh2bh2_2016-17_exam_answers
  • I am looking for comments and annotations:
    • indicating directly bonded vs through space interactions
    • the distance dependence ie weak vs medium vs strong interactions
    • discussion of polarized or directed interactions
    • mention of s,p or d relative intensity of overlap
    • the nodal character, on atoms is less antibonding than between atoms
    • AND a clean tidy diagram that is well annotated