1. Chair for Theoretical Chemistry and Catalysis Research Center,
Technische Universität München, Lichtenbergstr. 4, D-85747
Garching, Germany
2. Department of Chemistry, Kathleen Lonsdale Materials Chemistry,
University College London, 20 Gordon St., London WC1H 0AJ,
United Kingdom
3. Scientific Computing Department, STFC Daresbury Laboratory, Daresbury, Warrington, United Kingdom
4. Department of Mechanical Engineering and Materials Science,
Duke University, Durham, North Carolina 27708,
USA