octahedral cages.In compound 1, the [Cd6(Cd)L6] cages are interconnected by Cd2O2 dimeric units into a novel 〈2 0 0〉 layer.Packing of such 2D layers results in cavities that are occupied by lattice water molecules.The structure of compound 2 is composed of Zn6(Zn)L6}4− cluster anions and 1D cationic chains of Ni(bipy)(H2O)4}2+.The lattice water molecules are located in the tunnels created by the above two
具有N-(膦酰基甲基)-N-甲基甘氨酸(MeN(CH 2 CO 2 H)(CH 2 PO 3 H 2),H 3 L)的三种新的多金属氧酸盐,即Cd 9 L 6(H 2 O)12 · 19H 2 O(1),Zn 7 L 6 } Ni(bipy)(H 2 O)4 } 2 ·16H 2 O(2)(bipy = 4,4-bipyridine)和[H 3 O] Zn 7 L 6 } Ni(H2 O)2(bipy)2 } 1.5 ·12H 2 O(3)已合成并确定结构。所有三种化合物的结构均由氧桥M 6(M)L 6(M = Zn或Cd在化合物1中,[Cd 6(Cd)L 6 ]笼通过Cd 2 O 2二聚体单元相互连接成一个新颖的<2 0 0>层。此类2D层的堆积导致空腔被占据化合物2的结构由Zn 6(Zn)L 6 }组成Ni(bipy)(H 2 O)4 } 2+的4-簇阴离子和一维阳离
[EN] CONTINUOUS PROCESS FOR PREPARING N-PHOSPHONOMETHYL GLYCINE<br/>[FR] PROCEDE EN CONTINU DE PREPARATION DE N-PHOSPHONOMETHYL GLYCINE
申请人:DOW AGROSCIENCES LLC
公开号:WO2003099831A1
公开(公告)日:2003-12-04
In general the present invention relates to a continuous process for manufacturing (N-phosphonomethyl) glycine, glyphosate, by the catalyzed oxidation of N-phosphono-methyliminodiacetic acid. Glyphosate can be provided in high yield and in a cost efficient process by minimizing the competing side reactions and by-products. The process includes conducting the oxidation reaction and selecting an appropriate catalyst to maximize the rate of the oxidation of N-phosphonomethyliminodiacetic acid while at the same time minimizing the rate of oxidation of glyphosate in the same reaction.