[PDF] EFFECT OF REACTION TIME ON BASE HYDROLYSIS OF METHYL





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THE HYDROLYSIS OF METHYL ORTHO-NITROBENZOATE IN

o-nitrobenzoic heated a duplicate containing acid; methyl benzoate. Page 3. HYDROLYSIS OR METHYL ORTHO-NITROBENZOATE. 323 ..





Heavy-atom isotope effects on the acid-catalyzed hydrolysis of

effects on the alkaline hydrolysis of methyl benzoate5



Heavy-atom isotope effects on the alkaline hydrolysis of methyl

methyl benzoate and methyl formate in water at 25 °C. by heavy-atom isotope effects 1.005) on the alkaline hydrolysis of methyl benzoate.7 Once again ...



Reactions of Carbonyl Compounds in Basic Solutions. Part 30.1 The

1 янв. 1997 г. Hydrolysis of Methyl Benzoate and Phenyl Acetate†. Keith Bowden* Jamshid Izadi and Sarah L. Powell. Department of Biological and Chemical ...



Heavy-atom isotope effects on the alkaline hydrolysis and

hydrolysis of methyl benzoate is faster than oxygen exchange26 by a factor of about 28 at 25 °C. Themeasured hydrolysis to exchange ratios are all rendered 



The Hydrolysis of Esters of Some Substituted Benzoic Acids in

function if the transition state doesnot include water. For thefollowing esters the rates vary linearly with Ch+: methyl benzoate at 90° in aqueous perchloric 



estimation of hydrolysis rate constants of carboxylic acid ester and

methyl benzoate cyclohexyl acetate cyclopropyl acetate. Figure 2. Log hydrolysis rate constants vs temperature for alkaline hydrolysis of methyl benzoate in 80%.



EFFECT OF REACTION TIME ON BASE HYDROLYSIS OF METHYL

Acid Hydrolysis of Methyl Benzoate was prepared by the above name student and was submitted to the "F ACUL TY" as a full fulfilment for the confennent of 



The Mechanism of the Alkaline Hydrolysis of Methyl 24

https://pubs.acs.org/doi/pdf/10.1021/ja01583a018



THE HYDROLYSIS OF METHYL ORTHO-NITROBENZOATE IN

HYDROLYSIS OR METHYL ORTHO-NITROBENZOATE. 321 and hydrochloric acid present potash hydrolyzes considerably faster than does methyl benzoate; but he.



The Concurrent Alkaline Hydrolysis and Isotopic Oxygen Exchange

drolysis havebeen demonstrated in the hydrolyses of a number of benzoateesters including methyl benzoate.4·6. This concurrent hydrolysis and ex-.





The hydrolyses of some sterically crowded benzoate esters in

The excess acidity method has been used to analyze the observed acid-catalyzed hydrolysis rate constants for methyl benzoate methyl pnm-toluate



Heavy-atom isotope effects on the acid-catalyzed hydrolysis of

effects on the alkaline hydrolysis of methyl benzoate5



215 HH W11-final-key

catalyzed hydrolysis of methyl benzoate to benzoic acid. You may use HA as your acid catalyst and A- as its conjugate base. Mechanism:.



The Hydrolysis of Esters of Some Substituted Benzoic Acids in

methyl benzoate at 90° in aqueous perchloric acid of from 1 to 4 M; -glyceryl monobenzoate and monoanisoate at 90° in solutions.



Mechanism of hydrolysis of methyl pseudo-2-benzoylbenzoate in

cator slope for benzoate esters based on preliminary work on methyl benzoate. The rapid hydrolysis of 2 hasmade it impossible for us to determine m.



[PDF] EFFECT OF REACTION TIME ON BASE HYDROLYSIS OF METHYL

25 jui 2018 · The study found that methyl benzoate is important in the production of higher ester through transesterification in which methyl benzoate reacts 



The Mechanism of the Alkaline Hydrolysis of Methyl 246

The alkaline hydrolysis of methyl mesitoate is apparently similar to that of ethyl benzoate in that a symmetrical addition compound capable of exchange 



THE HYDROLYSIS OF METHYL ORTHO-NITROBENZOATE IN

point we measured the rates ofhydrolysis of methyl benzoate and methyl o-nitrobenzoate and the rate of esterification of o-nitrobenzoic acid in



[PDF] Hydrolysis of Methyl Benzoate from Piper arboreum by Naupactus

20 fév 2009 · 89 Herein we describe the hydrolysis of methyl benzoic acid derivative 1 to 3-geranyl-4-hydroxybenzoic acid (2) during the digestive process 



The hydrolyses of some sterically crowded benzoate esters in

The mechanistic changeover from A-2 to &-I hydrolysis occurs at lower acidity with increasing methyl substitution mainly due to the decrease in activation



The Hydrolysis of Benzoate Esters by Carboxypeptidase A and the

nisrn of ester hydrolysis catalyzed by carboxypeptidase A is discussed in the light of the above bromoacetyl-N-methyl-L-phenylalanine has been



Hydrolysis of several substituted methyl benzoates in the aqueous

The hydrolysis of several ring substituted methyl benzoates was investigated in aqueous solution over a pH range of 3–10 Both the pH dependence (at pH > 5) 



Ultrasound mediated alkaline hydrolysis of methyl benzoate

In the present work hydrolysis of methyl benzoate was carried out using aqueous sodium hydroxide solution at room temperature in the presence of ultrasound 



Microbial hydrolysis of methyl aromatic esters by Burkholderia

In this paper we describe the isolation of a microorganism degrading methyl benzoate and its ability to degrade different methyl aromatic esters 2 Materials 

  • How does methyl benzoate react with hydrolysis?

    Saponification in alkaline water at high temperature Slightly alkaline H2O (2% KOH) promotes hydrolysis of methyl benzoates 1 in the temperature range 200 to 300 °C, even though there is little conversion of 1 at 5 150 °C.

  • What is the product of the hydrolysis of methyl benzoate?

    Benzoic acid was synthesized from methyl benzoate by base hydrolysis in the present of NaOH and KOH as catalyst in this study. According to Bruice (2006), hydrolysis reaction is a reaction with water where the initially one compound converts to two compounds.25 jui. 2018

  • Does methyl benzoate react with water?

    Methyl 3-nitrobenzoate is insoluble in water but soluble in hot ethanol. Therefore the crude material can be purified by recrystallization from a water/ethanol mixture.
  • For example, hydrolysis of ethyl benzoate yields sodium benzoate and ethyl alcohol.

EFFECT OF REACTION TIME ON BASE HYDROLYSIS

OF METHYL BENZOATE

ROSSIDAH SINJAANAK DAVID DARI

(43864)

Bachelor ofScience with Honours

(Resource Chemistry) 2016
EFFECT OF REACTIONN TIME ON BASE HYDROLYSIS OF METHYL

BENZOATE

ROSSIDAH SINJA ANAK DAVID DARI (43864)

This project paper is submitted in partial fulfillment of requirements the Degree of

Bachelor of Science with honors

(Program of Resource Chemistry)

Faculty

of Resource Science and Technology

UNIVERSITI MALAYSIA SARA

WAK 2016
II 7 r Acknowledgement I would like to express my deepest gratitude to the many people that helped to bring this research project to success. I want to thank, first and foremost my supervisor, Miss Yusralina bt Yusof for providing me the opportunity to taking part in this Final Year Project. I am so grateful for her help, professionalism and valuable guidance throughout this project that I do not have enough words to give my sincere appreciation. I would also like to thank all the staffs that involve in the analysis of data for this research project. Without their passionate participation and input, the analysis of data could not have successfully conducted.

I am indebted to my friends who support me

in this research project through the entire year. I cannot find words to express my gratitude to them in making this research project to fruition. I consider it an honor to work with all of them during this project. Last but not least, I must express my profound gratitude to my parents for providing me with unfailing support throughout my years of study and through the process of researching and writing this thesis. This thesis would not have been possible without them.

Thank you.

III

UNIVERSITI MALAYSIA SARA WAK

Grade:

Please tick (..Jj

Final Year Project Report lZ::]

Masters D

I

PhD .D

DECLARAnON OF ORIGINAL WORK

This declaration

is made on the 17th May 2012.

Student's Declaration:

I Rossidah Sinja anak David Dari, 43864, Faculty of Resource Science and Technology hereby declare that the work entitled, Effect of Reaction Time on Base Hydrolysis of Methyl

Benzoate

is my original work. I have not copied from any other students' work or from any other sources except where due reference or acknowledgement is made explicitly in the text, nor has any part been written for me by another person. \·1"''' It\ )0\\.I Date submitted Rossidah Sinja anak David Dari (43864)

Supervisor's Declaration:

I, Yusralina binti Yusof, hereby certify that the work entitled, Effect of Reaction Time on

Acid Hydrolysis

of Methyl Benzoate was prepared by the above name student, and was submitted to the "F ACUL TY" as a full fulfilment for the confennent of Bachelor of Science IV with Honours (Resource Chemistry), and the aforementioned work, to the best of my knowledge, is the said student's work.

Date: 21 / b /.2-01 bReceived for examination by:

I declare this Project/Thesis

is classified as (Please tick (..Jj): D CONFIDENTIAL (Contain confidential information under the Official Secret Act

1972)*

DRESTRICTED

(Contains restricted information as specified by the organisation where research was done)*

DOPEN ACCESS

Validation

of Project/Thesis I therefore duly affirmed with free consent and willingness declared that this said Project/Thesis shall be placed officially in the Centre for Academic Information Services with the abide interest and rights as follows:

This Project/Thesis is the sole legal property

of Universiti Malaysia Sarawak (UNIMAS). The Centre for Academic Information Services has the lawful right to make copies for the purpose of academic and research only not for other purposes. The Centre for Academic Information Services has the lawful right to digitise the content to for the Local Content Database. The Centre for Academic Information Services has the lawful right to make copies of the Project/Thesis for the academic exchange between Higher Learning Institute. v __ ___ _ No dispute or any claim shall arise from the student himself / herself neither third party on this ProjectlThesis once it becomes sole property ofUNIMAS. This Projectffhesis or any material, data and information related to it shall not be distributed, published or disclosed to any party by the student except with

UNIMAS permission.

D

Student's signature: __. Supervisor's signature:

(17th May 2016) (17th M'ay 2016)

Current Address:

Rumah Sandah Ulu Machan

96700, Kanowit

Notes:

* If the ProjectlThesis is COFIDENTIAL or RESTRICTED, please attach together as annexure a letter from the organisation with the period and reasons of confidentiality and restriction. VI I

Table of Content

Acknowledgement ........................................................................�...........................................

III

DECLARATION OF ORIGINAL WORK ........................................................................�.... .IV

Table

of Content ........................................................................�............................................ VII

List of Abbreviation........................................................................�.......................................... X

List

of Table........................................................................�.....................................................XI

List

of Figure ........................................................................�................................................. XII

1.0 Introduction........................................................................�.................................................. I

1.1 Background ........................................................................�.................................................. I

1.2 Problem statement ........................................................................�.................................... 3

1.3 Objective ........................................................................�.................................................. 3

2.0 Literature Review ........................................................................�........................................ 4

2.1 Ester........................................................................�.......................................................... 4

2.1.1 Methyl benzoate ........................................................................�................................ 4

2.2 Benzoic acid ........................................................................�............................................. 5

2.2.1. Application

of benzoic acid ........................................................................�.............. 6

2.3 Hydrolysis ........................................................................�................................................ 6

2.3.1 Base hydrolysis ........................................................................�.................................. 7

2.3.2 Base hydrolysis

of carboxylic ester ........................................................................�... 7

2.3.2 Acid hydrolysis ........................................................................�.................................. 8

2.3.3 Solvent effects

on hydrolysis........................................................................�............. 8

VII

3.0 Materials and Methods ........................................................................�............................... 10

3.1 Preparation of2 M NaOH ........................................................................�...................... 10

3.3 Preparation of2 M HC1 ........................................................................�.......................... 10

3.4 Base hydrolysis of methyl benzoate with solvent.. ........................................................ 10

3.5 Purification of benzoic acid ........................................................................�................... 11

3.6 Preparation of sample for analysis ........................................................................�......... 11

3.6.1 FTIR analysis ........................................................................�................................... 11

3.6.2 Melting point analysis ........................................................................�..................... 12

4.0 Result and Discussion ........................................................................�................................ 13

4.1 Effect off reaction time on base hydrolysis ................................................................... 13

4.1.1 Comparison between the effect of reaction time on methyl benzoate by using

NaOH in the presence and absence

ofMeOH .................................................................. 17

4.1.2 Comparison between the effect of reaction time on base hydrolysis of methyl

benzoate by using KOH in the presence and absence of MeOH...................................... 18

4.1.3 Comparison between the effect of reaction time on methyl benzoate by using

NaOH and KOH in the presence

ot\leOH...................................................................... 19

4.1.4 Comparison between the effect of reaction time on methyl benzoate by using

NaOH and KOH in the absence

of MeOH ....................................................................... �20

4.2 FTIR analysis

of benzoic acid ........................................................................�................ 21

4.3 NMR analysis of benzoic acid ........................................................................�............... 22

.3.1 1H NMR analysis ........................................................................�............................. 22

4.3.2

DC NMR analysis ........................................................................�............................ 23

VIII I

4.4 Melting point analysis of benzoic acid .......................................................................... 24

5.0 Conclusion ........................................................................�................................................. 26

'II 6.0 References.......................................................................................................................... 27

7.0 Appendix...............................................................................�............................................. 28

IX I

List of Abbreviation

C=O Carbonyl

FTIR Fourier Transfonn Infrared Spectroscopy

NMR Nuclear Magnetic Resonance

KOH Potassium Hydroxide

NaOH Sodium Hydroxide

MeOH Methanol

HCI Hydrochloric Acid

KBr

Potassium Bromide

x

List of Table

Table I: Effect of reaction time on base hydrolysis of methyl benzoate by using NaOH in the presence

ofMeOH ............................................................................................................... 13

Table 3:Effect of reaction time on base hydrolysis of methyl benzoate by using KOH in the presen

ceofMeOH ............................................................................................................... 15

Table 4:Effect of reaction time on base hydrolysis of methyl benzoate by using KOH in the absence

ofMeOH ................................................................................................................ 16

Table 5: IH NMR data ......................................................................................................... 23

Tab

le 6: l3e NMR................................................................................................................ 24

Table

7: Melting point of benzoic acid ................................................................................ 24

Table

8: Experimental data for hydrolysis of methyl benzoate to form benzoic acid ......... 28

Table 9Base hydrolysis

of methyl benzoate by using NaOH in the presence of MeOH..... 28 Table 10 : Base hydrolysis of methyl benzoate by using NaOH as catalyst in the absence of

MeOH .................................................................................................................................. 29

Table 11 : Base hydrolysis of methyl benzoate by using KOH as catalyst in the absence of

MeOH .................................................................................................................................. 29

Table 12 : Base hydrolysis of methyl benzoate by using KOH as catalyst in the presence of

MeOH ............................................................................................................................. 30

XI

List of Figure

Figure 1 : Structure of methyl benzoate ................................................................................... 1

Figure 2: Transesterification

of methyl benzoate to propyl acetate ....................................... 1

Figure

3: Structure of benzoic acid ........................................................................�................ 2

Figure 4: Mechanism

of chlorinating of toluene to give benzoic acid .................................. 2

Figure

5: Fischer's esterification ........................................................................................... 5

Figure 6: Reaction of methyl benzoate with ammonia .......................................................... 5

Figure

7: Oxidation of toluene with air ........................................................................�......... 5

Figure 8: Preparation

of benzoic acid from phthalic anhydride ............................................ 6quotesdbs_dbs14.pdfusesText_20
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