Spectrophotometric study of the charge transfer complexes of 4'-nitrobenzo-15-crown-5 and benzo-15-crown-5 with iodine in nonaqueous solvents

doi:10.1016/j.cclet.2010.11.032

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Abstract The formation of charge transfer complex between iodine with 4'-nitrobenzo-15-crown-5(NB15C5)and benzo-15-crowN-5(B15C₅)is investigated spectrophotometrically in chloroform and dichloromethane(DCM)solutions at 25℃.The pseudo-first-order rate constants for the transformation process were evaluated from the absorbance-time data and found to vary in the order of DCM > CHCl₃.The values of the formation constant, K_f, for each complex are evaluated from Benesi-Hilebrand equation.Stability of the resulting complex in two solvents was also found to vary in the order of DCM > CHC1₃.

Key words： Charge transfer complex Spectrophotometry Kinetic Crown ether

Received: 30 August 2010

Corresponding Authors: Nina Alizadeh, E-mail address:nializadeh@yahoo.com E-mail: nializadeh@yahoo.com

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	Nina Alizadeh
	Sadegh Dehghanikhah

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Nina Alizadeh,Sadegh Dehghanikhah. Spectrophotometric study of the charge transfer complexes of 4'-nitrobenzo-15-crown-5 and benzo-15-crown-5 with iodine in nonaqueous solvents[J]. CCL, 2011, 22(05): 587-590.

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http://www.chinchemlett.com.cn/EN/10.1016/j.cclet.2010.11.032 OR http://www.chinchemlett.com.cn/EN/Y2011/V22/I05/587