The condensation of 2,2′‐diamino‐4,4′‐dimethyl‐1,1′‐biphenyl with 2‐hydroxybenzaldehyde (salicylaldehyde) or their 3‐, 4‐ or 5‐methoxy substituted congeners leads to the formation of 2,2′‐bis(salicylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl (1a) and their methoxy‐substituted congeners 1b–1d. Deprotonation of 1a with KH yields octameric and wheel‐shaped dipotassium 2,2′‐bis(2‐oxidobenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl (2a) that is only very sparingly soluble in common organic solvents. Attached methoxy groups are able to stabilize smaller aggregates and trimeric dipotassium 2,2′‐bis(2‐oxido‐3‐methoxybenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl (2b) has been isolated. The metathesis reaction of 2a with [(thf)₂TiCl₄] yields 2,2′‐bis(2‐oxidobenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl titanium(IV) dichloride (3) with two isomeric forms, one with a cis and another with an uncommon trans arrangement of the halide ions.

中文翻译：

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2,2'-双（2-氧化亚苄基亚氨基）-4-钾，4'-二甲基-1,1'-联苯衍生物的合成及用作配体转移试剂

2,2'-二氨基-4,4'-二甲基-1,1'-联苯与2-羟基苯甲醛（水杨醛）或其3-，4-或5-甲氧基取代的同类物的缩合导致形成2， 2'-双（水杨亚氨基）-4,4'-二甲基-1,1'-联苯（1a）及其甲氧基取代的同类物1b – 1d。用KH对1a进行质子化生成八角形和轮状双钾2,2'-双（2-氧化苄叉亚氨基）-4,4'-二甲基-1,1'-联苯（2a）仅微溶于普通有机溶剂。附着的甲氧基能够稳定较小的聚集体和三聚二钾2,2'-双（2-氧化-3-甲氧基苄叉亚氨基）-4,4'-二甲基-1,1'-联苯（2b）已被隔离。2a与[（thf）₂ TiCl ₄ ]的复分解反应生成2,2'-双（2-氧化苄叉亚氨基）-4,4'-二甲基-1,1'-联苯二氯化钛（IV）（3）异构体形式，一种具有顺式，另一种具有不常见的卤离子反式排列。