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Synthesis, crystal structure and photochromism of tri(N,N,N′,N′-tetramethylethylendiammonium)heptamolybdate(VI)tetrahydrate

✍ Scribed by Niu Jing-Yang; You Xiao-Zeng; Fun Hoong-Kun; Zhou Zhong-Yuan; Yip Boon-Chuan


Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
367 KB
Volume
15
Category
Article
ISSN
0277-5387

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The base catalyzed N,N'-dialkylation of the vinylogous indigo dye cis-cis-2a proceeds with concomitant isomerization and yields cis-trans-2b,c as minor, and trans-trans-2b,c,d as major products. Upon exposure to light, cis-trans-2b,c isomerizes to trans-trans-2b,c. According to an X-ray analysis, tr