Dielectric relaxation time and dipole moment of isometric butanols in benzene solutions.

Khameshara, S.M.; Kavadia, M.S.; Lodha, M.S.; Mathur, Dipti; Vaidya, V.K.

doi:10.1016/0167-7322(83)80064-6

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…In all the systems, the values of   are significantly higher than   and  0 . Higher value of   indicates that the presence of intermolecular or overall molecular relaxation is larger in comparison to intramolecular or individual molecular relaxation in the systems [15]. It is observed that the value of relaxation times  ,  2 and  0 increases with increasing chain length of 2-alkoxyethanols with aniline in the selected solvents.…”

Section: Resultsmentioning

confidence: 71%

Dielectric Relaxation Phenomenon between Aniline and 2-Alkoxyethanols in Different Non Polar Solvents by Frequency Domain Technique

Basha¹

2017

IJRASET

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Abstract:The dielectric relaxation studies have been carried out on the ternary mixture of aniline with 2-alkoxyethanols (2-methoxyethanol, 2-ethoxyethanol and 2-butoxyethanol) in the dilute solution of non polar solvents benzene, CCl₄, 1,4-dioxane and toluene. The solutions were prepared for various molar ratios (1:3, 1:2, 1:1, 2:1 and 3:1) over the frequency at 9.43GHz in room temperature by using X-Band microwave technique were studied. The dielectric parameters like  0 , ',  " and are calculated. In addition, the dielectric relaxation times 1 2 and 0 have been calculated by employing Higasi's method and activation energies f and f have been determined using dielectric data. The most likely association between hydroxyl groups of 2-alkoxyethanols with the amino group of aniline was studied. The results showed that the interaction of the order: 2-butoxyethanol >2-ethoxyethanol >2-methoxyethanol and play an important role in determination of the strength of hydrogen bond. 2-alkoxyethanol and aniline are known for their self-association through intermolecular hydrogen bonding. Aniline has a phenyl group attached to an amino group having various applications. For example, as additives to rubber processing chemicals, herbicides [7],rocket fuel [8], synthetic dye industry [9] and emerged as an analgesic drug [10]. In the other hand, 2-alkoxyethanols is bifunctional organic compound and it contains both hydroxyl and ethergroups as well as an alkyl group. 2-alkoxyethanol is commercially known as cellosolves, in their pure state which is self-associated and form cyclic dimers in which the hydroxy proton of one cellosolve molecule is bound to the ether oxygen atom of the other [11]. The present paper reports dielectric constants, dielectric loss, dielectric relaxation time and activation free energy for ternary mixtures containing aniline with2-alkoxyethanols (2-methoxyethanol, 2-ethoxyethanol and 2-butoxyethanol) in different non polar solvents (benzene, CCl 4 , 1,4 dioxane and toluene) at room temperatures. Studying intermolecularHbonding between hydroxyl group of 2-alkoxyethanol and N-H group of aniline and interactions between the mixtures containing 2-alkoxyethanol are very important not only because of their selfassociation, but also due to the strong intramolecular effects produced by the presence of -O-and -OH groups in the same molecule [12].

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Section: Resultsmentioning

confidence: 71%

Dielectric Relaxation Phenomenon between Aniline and 2-Alkoxyethanols in Different Non Polar Solvents by Frequency Domain Technique

Basha¹

2017

IJRASET

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“…The mixture selected for the study is ternary systems of primary amines (methyl, ethyl and propyl) with proton donor 2fluorobenzoic acid using 1,4dioxane as solvent. Especially, the value of relaxation time (τ) of the mixtures pointed out that the participation of intermolecular relaxation or overall molecular relaxation is superior in association to intramolecular interactions [35]. Tables 13 provided the values of relaxation time and found increasing trend with regard to the chain length [36] of primary aliphatic amines with 2-fluorobenzoic acid.…”

Section: Resultsmentioning

confidence: 99%

Molecular Interactions and Dielectric Relaxation in the Mixtures of Amines with 2Fluorobenzoic Acid in 1, 4Dioxane

Aravinthraj*,

Udayaseelan,

Ali Khan

2019

IJITEE

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For the present study, the estimation of the static dielectric constants (0 ), dielectric constant () at an angular frequency and dielectric loss () of methyl, ethyl and propyl amines with 2-fluorobenzoic acid in 1,4-dioxane were carried using Klystron microwave bench at frequency 9.43GHz. Using the dielectric parameters, the overall relaxation time (1 ) and group rotation relaxation time (2 ) of the polar solute molecules and average relaxation times (0 ) were also determined using Higasi and Gopalakrishna method employing Debye’s equations. The obtained results revealed that, out of five different molar ratios, relaxation time () is maximum at 1:1 molar concentration for all the systems due to inter and intramolecular interactions through hydrogen bonding. In addition, the dipole moment, activation viscous flow (f) and dielectric relaxation (f ) due to molar free energy also been discussed.

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“…This may be due to the fact that the CH 3 group attached to the same carbon atom as which the O−H group is attached. This increases the size of the molecule and may cause hindrance to the group rotation, which may give rise to increased relaxation time …”

Section: Resultsmentioning

confidence: 99%

“…This increases the size of the molecule and may cause hindrance to the group rotation, which may give rise to increased relaxation time. 26 From the Table 4, it is seen that the values of relaxation time in CCl 4 are higher than benzene and n-heptane, which shows direct proportionality with the nature of solvent used. Carbon tetrachloride is a symmetrical and a nonpolar molecule.…”

Section: Ftir Studiesmentioning

confidence: 90%

Molecular Associations in Alcohol−Methyl Methacrylate Mixtures

et al. 2006

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Molecular association between alcohols (1-propanol, 1-butanol, sec-butanol, tert-butanol, 1-pentanol, 1-heptanol, 1-octanol, and 1-decanol) with methyl methacrylate has been studied in n-heptane, CCl4, and benzene at 298 K using FTIR spectroscopic and dielectric methods. The result obtained from both methods indicates only the existence of most likely 1:1 complex formation between the alcohol and the methyl methacrylate in these systems. The alkyl chain length of alcohol and the solvent used plays a significant role on the strength of hydrogen bond (OH:OC) determined on the basis of spectral and dielectric parameters.

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Dielectric relaxation time and dipole moment of isometric butanols in benzene solutions.

Cited by 7 publications

References 13 publications

Dielectric Relaxation Phenomenon between Aniline and 2-Alkoxyethanols in Different Non Polar Solvents by Frequency Domain Technique

Dielectric Relaxation Phenomenon between Aniline and 2-Alkoxyethanols in Different Non Polar Solvents by Frequency Domain Technique

Molecular Interactions and Dielectric Relaxation in the Mixtures of Amines with 2Fluorobenzoic Acid in 1, 4Dioxane

Molecular Associations in Alcohol−Methyl Methacrylate Mixtures

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