Fragmentation, Rearrangement, and Elimination in Heptamethylpropane Derivatives<sup>1,2</sup>
作者:V. J. Shiner、Günter F. Meier
DOI:10.1021/jo01339a029
日期:1966.1
RESIST POLYMER, PROCESS FOR PRODUCTION THEREOF, RESIST COMPOSITION, AND PROCESS FOR PRODUCTION OF SUBSTRATES WITH PATTERNS THEREON
申请人:Mitsubishi Rayon Co., Ltd.
公开号:US20130252181A1
公开(公告)日:2013-09-26
A resist polymer (Y′), which is used as a resist resin in DUV excimer laser lithography, electron beam lithography, and the like, contains a polymer (Y) comprising: a constituent unit (A) having a lactone skeleton; a constituent unit (B) having an acid-eliminable group; a constituent unit (C) having a hydrophilic group; and a constituent unit (E) having a structure represented by the following formula (1), wherein a content of the constituent unit (E) is 0.3 mol % or more based on the total number of the constituent units of the resist polymer (Y′):
[Chemical formula 1]
in the formula (1), L is a divalent linear, branched, or cyclic C
1-20
hydrocarbon group which may have a substituent and/or a heteroatom; R
11
is a g-valent linear, branched, or cyclic C
1-20
hydrocarbon group which may have a substituent and/or a heteroatom; and g represents an integer of 1 to 24.
US9188857B2
申请人:——
公开号:US9188857B2
公开(公告)日:2015-11-17
Effect of sp 2 and sp hybridised atoms on barriers to rotation in highly substituted ethanes. Steric acceleration of conformational processes
作者:J. E. Anderson、C. W. Doecke、H. Pearson、D. I. Rawson
DOI:10.1039/p29780000974
日期:——
Barriers to rotation about the central bond of the 1,2,2-trimethylbutyl (triptyl) group, i.e. barriers to rotation of the t-butyl group, are reported for a series of triptyl compounds But–C(CH3)2X, where the atom in X bonded to the triptyl group is an sp2 or sp hybridised carbon. Barriers in some similar compounds are also reported. Results are discussed in terms of the interactions arising during
据报道,一系列三叔丁基化合物Bu t –C(CH 3)2 X绕1,2,2-三甲基丁基(三苯甲基)基团的中心键旋转的障碍,即叔丁基旋转的障碍。,其中X中与三苯甲基键合的原子是sp 2或sp杂化碳。还报道了一些类似化合物中的屏障。根据旋转过程中产生的相互作用以及构象过程的空间加速度讨论了结果。
Nuclear magnetic resonance spectroscopy. Barriers to internal rotation in some halogenated methylbutanes
作者:John D. Roberts、Bruce L. Hawkins、Wolfgang Bremser、S. Borcic
DOI:10.1021/ja00747a022
日期:1971.9
Barriers to internalrotation about the C(2)-C(3) bonds have been determined for ten closely related halogenated methylbutanes by detailed line-shape analysis of their nuclear magnetic resonance spectra. The experimental barriers range from 9 to 16 kcal/mol. In addition, for some of the compounds investigated, free energy differences were obtained for rotational isomers under conditions of slow conformational