Dienes and liquid-crystalline media
    54.
    发明授权
    Dienes and liquid-crystalline media 失效
    二烯和液晶介质

    公开(公告)号:US5744058A

    公开(公告)日:1998-04-28

    申请号:US458704

    申请日:1995-06-02

    摘要: Dienes of the formula I ##STR1## in which n is 0, 1, 2, 3, 4 or 5, r is 1, 2 or 3, s is 1 or 2, ##STR2## is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl, ##STR3## is trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, unfluorinated or mono- or polyfluorinated 1,4-phenylene, in which one or two CH groups may also be replaced by N, or the central part ##STR4## Z is a single bond, a bridging member selected from the group consisting of --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CO--O--, --CH.sub.2 O--, --OCH.sub.2 -- and --O--CO--, or any desired combination of two such bridging members, where two O atoms are not linked directly to one another, and R is --CN, --NCS, halogen or an alkyl, alkenyl, alkoxy or alkenyloxy group, in each case having up to 12 carbon atoms and in each case unsubstituted or monosubstituted or polysubstituted by fluorine and/or chlorine.

    摘要翻译: 式I的二烯类,其中n为0,1,2,3,4或5,r为1,2或3,s为1或2,图像为反式-1,4-亚环己基 或反式-1,3-二恶烷-2,5-二基,图像是反式-1,4-亚环己基,反式-1,3-二恶烷-2,5-二基,未氟化或单氟化或多氟化1,4 - 亚苯基,其中一个或两个CH基团也可以被N取代,或者中心部分Z是单键,桥接成员选自-CH 2 CH 2 - , - CH = CH - , - C 3BOND C - , - CO-O - , - CH 2 O-,-OCH 2 - 和-O-CO-,或两个这样的桥连构件的任何所需组合,其中两个O原子不直接连接 并且R是-CN,-NCS,卤素或烷基,烯基,烷氧基或烯氧基,在每种情况下具有至多12个碳原子,并且在每种情况下都是未被取代或被氟和/或氯单取代或多取代的。

    Liquid-crystalline medium
    55.
    发明授权
    Liquid-crystalline medium 失效
    液晶介质

    公开(公告)号:US06673268B1

    公开(公告)日:2004-01-06

    申请号:US08459128

    申请日:1995-06-02

    IPC分类号: C09K1930

    摘要: A MIM-liquid crystal display comprising a MIM diode array, a pair of parallel substrates and a nematic liquid crystalline medium disposed between the pair of substrates, characterized in that the nematic liquid crystalline medium is based on a) a component A comprising one or more compounds of the formula I b) a component B comprising one or more compounds of the formula II in which R1, R2, R3, Z1, Z2, Z3, Z4, Q, X, L1, L2, m and n have the meaning given herein.

    摘要翻译: 一种MIM液晶显示器,包括MIM二极管阵列,一对平行衬底和布置在所述一对衬底之间的向列液晶介质,其特征在于,所述向列型液晶介质基于a)包含一种或多种化合物 式Ib)包含一种或多种式IIin的化合物的组分B,其中R 1,R 2,R 3,Z 1,Z 2,Z 3,Z 4 >,Q,X,L 1,L 2,m和n具有本文给出的含义。

    Catalyst and method for the carbonylation of oxiranes
    60.
    发明授权
    Catalyst and method for the carbonylation of oxiranes 失效
    催化剂和环氧乙烷羰基化方法

    公开(公告)号:US07420064B2

    公开(公告)日:2008-09-02

    申请号:US10523263

    申请日:2003-07-31

    IPC分类号: C07D305/12 B01J31/00

    摘要: Lactones are prepared by catalytic carbonylation of oxiranes using a catalyst system comprising a) at least one cobalt compound as component A and b) at least one metal compound of the formula (I) as component B, MXxRn-x   (I) where M is an alkaline earth metal or a metal of group 3, 4 or preferably 12 or 13 of the Periodic Table of the Elements, R is hydrogen or a hydrocarbon radical which may be substituted on the carbon atoms other than the carbon atom bound to M, X is an anion, n is a number corresponding to the valence of M and x is in the range from 0 to n, with n and x being selected so that the compound is uncharged, as catalyst.

    摘要翻译: 内酯通过使用包含a)至少一种钴化合物作为组分A和b)至少一种式(I)的金属化合物作为组分B的催化剂体系制备,所述催化剂体系包括:a)至少一种钴化合物作为组分A, “在线公式”end =“lead”?> MX R (I)<?in-line-formula description =“In-line Formulas”end =“尾”→其中M是元素周期表中的3,4或优选12或13的碱土金属或金属,R是氢或可以在碳原子上被取代的烃基 除了与M结合的碳原子之外,X是阴离子,n是对应于M的化合价的数,x在0至n的范围内,选择n和x,以使化合物不带电作为催化剂。