1. Institute of Crystallography, Russian Academy of Sciences, Leninsky pr. 59, 117333 Moscow, Russia, EMBL, Hamburg Outstation, Notkestrasse 85, D-22603 Hamburg, Germany, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St. 28, Moscow 117813, Russia, Departments of Chemical Engineering and Materials Science & Engineering, North Carolina State University, Raleigh, North Carolina 27695, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405