Abstract:
The present invention relates to a process for preparing polymers by means of ring-opening metathetic polymerization, consisting of the following steps: a) providing a reaction mixture consisting of a cycloalkene or a cycloalkene mixture, b) adding a ruthenium compound of the general formula RuX1X2L1aL2b (I) where a=0 or 1, b=1 or 2, such that a+b=2; X1, X2=independently selected anionic ligands; L1=uncharged π-binding ligand; L2=N-heterocyclic carbene of the formula IIa, IIb or IIc; c) adding a chain transfer agent in a molar ratio in the range from 1:5 to 1:1000 based on the cycloalkene or the sum total of the cycloalkenes in the cycloalkene mixture, d) converting at a temperature within a range from 0° C. to 250° C.
Abstract:
The present invention relates to a process for preparing olefins by means of metathesis, which comprises the following steps a. provision of an olefin reaction mixture containing at least one olefin, b. addition of a ruthenium compound of the general formula [RuX2L1xL2y]z (I), where X=anionic ligand; L1=uncharged π-bonding ligand; L2=uncharged electron donor ligand; x=0, 1; y=1, 2, 3; z=1, 2, c. addition of a Lewis acid and/or an anionic, noncoordinating salt, d. reaction at temperatures in the range from 30° C. to 140° C., where no addition of an alkyne or alkynol is carried out. The invention further relates to the use of this process in metathesis reactions.
Abstract translation:本发明涉及通过复分解制备烯烃的方法,其包括以下步骤a。 提供含有至少一种烯烃的烯烃反应混合物,b。 加入通式[RuX 2 L 1 x L 2y] z(I)的钌化合物,其中X =阴离子配体; L1 =不带电荷的键合配体; L2 =不带电子的电子给体配体; x = 0,1, y = 1,2,3; z = 1,2,c。 添加路易斯酸和/或阴离子非配位盐,d。 在30℃至140℃的温度下进行反应,其中不加入炔烃或炔醇。 本发明还涉及这种方法在复分解反应中的用途。