1. Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska 5, 02094 Kyiv 94, Ukraine, Fax: +380445373253
2. National Taras Shevchenko University, 62 Volodymyrska st., 01033 Kyiv, Ukraine
3. Department of X‐ray Diffraction Study and Quantum Chemistry, STC “Institute for Single Crystals”, National Academy of Science of Ukraine, 60 Lenina ave., 61001 Kharkiv, Ukraine