scholarly journals Spectral Correlations in some Substituted Styryl (E)-4-((2-Oxopropyl)Diazenyl) Benzoic Acids

2014 ◽  
Vol 30 ◽  
pp. 33-43
Author(s):  
V. Sathiyendiran ◽  
K.G. Sekar ◽  
Ganesamoorthy Thirunarayanan ◽  
R. Arulkumaran ◽  
R. Sundararajan ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Benzoic Acids ◽  
Effect Of Substituents ◽  
Substituent Constants ◽  
Multi Linear Regression ◽  
Spectral Group

A series of titled compounds were prepared and analyzed their purities by literature method. The infrared and NMR spectral group frequencies of the compounds were assigned and correlated with Hammett substituent constants, F and R constants using single and multi linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral frequencies was discussed.

scholarly journals Infrared and 13C NMR Spectral Studies of some Aryl Hydrazides: Assessment of Substituent Effects

2014 ◽  
Vol 32 ◽  
pp. 88-94 ◽  
Author(s):  
Ganesamoorthy Thirunarayanan ◽  
K.G. Sekar ◽  
R. Lakshmi Narayanan
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Substituent Effects ◽  
Spectral Studies ◽  
Substituent Constants ◽  
Multi Linear Regression ◽  
Spectral Group ◽  
C Nmr

A series of some aryl hydrazides have been synthesized. These hydrazides purities were analyzed by physical constants and spectral data. The assigned spectral group frequencies were correlated with Hammett substituent constants and Swain-Lupton parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the spectral group frequencies has been discussed

scholarly journals Hammett Spectral Correlations in Benzofuranyl Flavonols

2014 ◽  
Vol 25 ◽  
pp. 39-47
Author(s):  
Ganesamoorthy Thirunarayanan ◽  
K.G. Sekar
Keyword(s):  
Hydrogen Peroxide ◽  
Regression Analysis ◽  
Linear Regression ◽  
Sodium Bicarbonate ◽  
Spectroscopic Data ◽  
Chemical Shifts ◽  
Linear Regression Analysis ◽  
Infrared Spectral ◽  
Substituent Constants ◽  
Multi Linear Regression

A series containing eleven benzofuranyl flavonols have been prepared by cyclization of 3-hydroxybenzofuranyl chalcones with 30% hydrogen peroxide in the presence of sodium bicarbonate. The synthesized flavonols were characterized by their physical constants, analytical and spectroscopic data. The infrared spectral νOH, CO stretches(cm-1), NMR chemical shifts of OH, CO(δ, ppm) of these flavonols were assigned and correlated with Hammett substituent constants, F and R parameters using single and multi linear regression analysis. From the results of statistical analyses, the effects of substituents on the above group frequencies were discussed.

scholarly journals Spectral Correlations and Antimicrobial Activities of Some (E)-N-Benzylidenepyridin-2-Amines

2013 ◽  
Vol 11 ◽  
pp. 77-90 ◽  
Author(s):  
S.P. Sakthinathan ◽  
R. Suresh ◽  
V. Mala ◽  
K. Sathiyamoorthi ◽  
D. Kamalakkannan ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Spectral Data ◽  
Oxidative Coupling ◽  
Linear Regression Analysis ◽  
Antimicrobial Activities ◽  
Microwave Assisted ◽  
Solvent Free Conditions ◽  
Substituent Constants ◽  
Multi Linear Regression

A series of aryl imines have been synthesized by Fly-ash: PTS catalyzed microwave assisted oxidative coupling of amines and aldehydes under solvent-free conditions. The yield of the imines has been found to be more than 90%. The purity of all imines has been checked using their physical constants and spectral data as published earlier in literature. The UV λmaxC=N(nm), infrared νC=N(cm-1), NMR δ(ppm) of CH=N and C=N spectral data have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied. The antimicrobial activities of all imines have been studied using Bauer-Kirby method.

scholarly journals Synthesis and Spectral Studies of some N-[(E)-Phenylmethylidene]benzenesulfonamides

2013 ◽  
Vol 13 ◽  
pp. 249-258
Author(s):  
K.G. Sekar ◽  
Ganesamoorthy Thirunarayanan
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Microwave Irradiation ◽  
Spectroscopic Data ◽  
Linear Regression Analysis ◽  
Solvent Free ◽  
Spectral Studies ◽  
Solvent Free Conditions ◽  
Substituent Constants

A series of some N-[(E)-phenylmethylidene]benzenesulfonamide derivatives have been synthesised using solid SiO2-H3PO4 catalyst under solvent free conditions in microwave irradiation. The synthesised E-N-benzene sulfonilimines purities have been verified by their physical constants and spectroscopic data. The spectral frequencies are correlated with Hammett substituent constants, F and R parameters using linear regression analysis. From the results of statistical analysis the effect of substituents on the group frequencies will be discussed.

The effects controlling the oxygen basicity in alkoxysilanes (RO)nSi(CH3)4-n. The mutual polarizability effect of alkoxy groups attached to silicon

1979 ◽  
Vol 44 (3) ◽  
pp. 750-755 ◽  
Author(s):  
Josef Pola ◽  
Marie Jakoubková ◽  
Václav Chvalovský
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Electronic Effect ◽  
Linear Regression Analysis ◽  
Effect Of Substituents ◽  
Relative Basicity ◽  
Polarizability Effect ◽  
Alkoxy Groups ◽  
Individual Series

Relative basicity of the oxygen in alkoxysilanes (RO)nSi(CH3)3-n having n = 1-4 and various electrondonating and electronwithdrawing groups R measured as Δν(OH) of phenol due to its interaction with these compounds in CCl4 is shown to be chiefly controlled by the electronic effect of substituents R. Linear regression analysis of the Δν(OH) vs n relatioship for individual series (RO)nSi(CH3)4-n suggests the operation of the polarizability effect of RO groups becoming more important with increasing electronwithdrawing nature of R.

scholarly journals The Influence of Work Facilities on Employee Performance at the Regional Financial Management Agency Secretariat Section of South Sulawesi Province

2019 ◽  
Vol 6 (1) ◽  
pp. 35
Author(s):  
Nurul Jihan Pratiwi ◽  
Jamaluddin Jamaluddin ◽  
Risma Niswaty ◽  
Rudi Salam
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Financial Management ◽  
Employee Performance ◽  
Linear Regression Analysis ◽  
Simple Linear Regression ◽  
Management Agency ◽  
Analysis Techniques ◽  
South Sulawesi

Adequate work facilities with suitable conditions that are well maintained and will help smooth the work process in an organization. This study aims to determine the use of work facilities, on the performance of employees in the section of the Regional Financial Management Agency Secretariat of South Sulawesi Province. Therefore, to achieve these objectives researchers used data collection techniques with observation, questionnaires, and documentation with a population of 35 people. While the data analysis techniques used are descriptive statistical analysis using percentages and for inferential statistical analysis techniques using data normality tests, product moment correlation analysis, and simple linear regression analysis. The results of the study indicate that the work facilities in the section of the South Sulawesi Provincial Financial Management Agency Secretariat are in a good category, in terms of indicators: machinery and equipment, infrastructure, work equipment, land, and buildings. For the quality of employee performance in the section of the South Sulawesi Provincial Financial Management Agency Secretariat in a good category, which is viewed from: quality, quantity, timeliness, effectiveness, and independence. Based on the product moment correlation test analysis, there is a positive and significant influence on the use of work facilities on the performance of employees in the section of the Regional Financial Management Agency of South Sulawesi Province at 17.00%, stated to be accepted with a moderate level of influence. From the results of simple linear regression analysis shows that there is an influence of work facilities on employee performance in the section of the Regional Financial Management Agency Secretariat of South Sulawesi Province.

scholarly journals Circular(2)-linear regression analysis with iteration order manipulation

2017 ◽  
Vol 3 (2) ◽  
pp. 107
Author(s):  
Muhamad Irpan Nurhab ◽  
Badaruddin Nurhab ◽  
Tuti Purwaningsih ◽  
Ming Foey Teng
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Circular Data ◽  
Linear Statistic ◽  
Statistic Method ◽  
Analysis Techniques ◽  
Circular Regression ◽  
Selection Of

The selection of statistical analysis techniques to be used must be adjusted to the data. Data in the form of time cycle or point position to the angle of possibility is no longer suitable to be analyzed using classical linear statistic method because the direction and the angle influence the position between one data with other data. This paper aims to examine the comparison of Linear Regression Analysis with Circular Regression Analysis. The writing method used is literature review using simulation data. Simulation of data and analysis is done with the help of R program. The results showed that circular data is better in Circular Regression Analysis than Classical Linear Regression Analysis, so the conclusion is Selection of statistical analysis techniques to be used must be adjusted with the data that already held. Data in the form of time cycles or position of the point to the angle of probability is no longer suitable to be analyzed using classical linear statistic method because the direction and the angle influence the position between one data with other data.

scholarly journals Preheated Fly-Ash Catalyzed Cyclization of Chalcones: Synthesis of some Substituted Pyrazole-1-Carbothioamides and Spectral Correlations in 3-(3,4-Dichlorophenyl)-5-(Substituted Phenyl)-4,5-Dihydro-1H-Pyrazole-1-Carbothioamides

2013 ◽  
Vol 15 ◽  
pp. 18-34 ◽  
Author(s):  
Ganesamoorthy Thirunarayanan ◽  
K.G. Sekar
Keyword(s):  
Regression Analysis ◽  
Fly Ash ◽  
Linear Regression ◽  
Microwave Irradiation ◽  
Spectral Data ◽  
Linear Regression Analysis ◽  
Solvent Free ◽  
Physical Constants ◽  
Multi Linear Regression ◽  
Substituted 1

Some substituted 1-thiocarbomyl pyrazolines including 3-(3,4-dichlorophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamides using solvent-free preheated fly-ash catalyzed cyclization between chalcones and thiosemicarbazide microwave irradiation. The yields of these thiocarbomyl pyrazolines are more than 80%. The purities of these synthesised pyrazoline derivatives are checked by their physical constants and spectral data earlier reported in the literature. The spectral data of these 3-(3,4-dichlorophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamides had been correlated, using single and multi-linear regression analysis.

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