The number, the relative abundance of conformers and the heigth of the rotation barriers obtained by the PCILO method are discussed for two series of compounds with neopentyl chains BuCH 2 (C=X)Y and triptyl groups tBu(Me) 2 C(C-X)Y. In each case, the eclipsed double bond form ...
发明人: E Riederle 摘要: The device has a rotation symmetric carrier (1) or tube. The carrier includes cover plates, which are cut. A cover includes a hinge (5) or a fastener (6). An arbitrarily formed cover panel is fastened to the cover, where the cover panel is made of differe...
英语翻译Many people have wondered what makes the oceans rise and fall on the world's beaches twice a day.Those tides are caused by the force of the Moon's graveity(地心引力) and the rotation(自转) of the Earth.Gravity acts on the center of