Which substituent on an aromatic ring is ortho-para director?下列芳香环上的取代基,属于邻-对位定位基的是:A. -CHOB. -SO⏫HC. -CH=CH⏫D. -CN 相关知识点: 试题来源: 解析 C 在芳香环的亲电取代反应中,取代基的定位效应取决于其电子效应:邻对位定位基团通常为给电子基团
while electron withdrawing groups are generally meta directors with the exception of the halogens which are also ortho/para directors as they have lone pairs of electrons that are shared with the aromatic ring. .
An alkoxy group connected to benzene ring is ortho- and para-orienting. Explain. View Solution The ortho and para directing groups are View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths ...
The narrow lines discovered by us on rotational transitions of H 2 O and OH molecules in water and water solutions of biomolecules are considered as resonances of circuits for ensuring the selectivity of communication. Discussed is the possibility of ortho/para conversion of H 2 O spin isomers ...
Nitrophenol can be defined as an organic compound having a benzene ring attached to a -OH group and -NO2 group at two positions of the benzene ring. Hence, this compound has the chemical formula HOC6H5-x(NO2)x. There are three forms of nitrophenol as ortho, para and metal form. The...
an oxime e. a hydrazoneWhy is m-nitro formed in the reaction of nitration of methyl benzoate instead of the ortho or para isomers? Draw the structure of the products formed on nitration of each of the following compounds: bDraw the major aromatic product f...
Secondary para-phenylenediamine N-alkylamine ortho and/or metasubstituted derivatives of formula (I) are new. Either R1, R2H or alkyl; or R1,R2 + N : 5-6 saturated cyclic chain (optionally interrupted with at least one nitrogen atom and/or with at least one carbonyl group optionally ...
3, no. 6, pp. 838-843.HYND, P. I., N. M. EDWARDS, M. HEBART, M. MCDOWALL AND S. CLARK (2009). "WOOL FIBRE CRIMP IS DETERMINED BY MITOTIC ASYMMETRY AND POSITION OF FINAL KERATINISATION AND NOT ORTHO- AND PARA-CORTICAL CELL SEGMENTATION." ANIMAL 3(6): 838-843....
A process for the chlorination is preferably in the para and / or ortho position of a phenolic compound by reaction with sulfurylclorid using a catalyst.WILLIAM DAVID WATSON
Phenyl acetic acid is replaced by a string containing piperazine position Ortho, meta or para to the Group acid, Preparation procedures and Pharmaceutical composition.Useful in the treatment of diabetes, Obesity and Atherosclerosis.The Invention relates to novel piperazine Derivatives of formula I, ...