Fenilglioksim Molekülünün Titreşimlerinin Analizi

Year 2010, Volume: 2 Issue: 36, 65 - 74, 01.06.2010

Zahide Tosun

Abstract

Bu çalışmada fenilglioksim molekülünün deneysel olarak ölçülen titreşim frekansları ile teorik olarak hesaplanmış titreşim frekanslarının uyumu incelenmiştir. Fenilglioksim molekülününgeometrioptimizasyonu ve titreşim frekansı hesaplamaları ab initio metotları kullanılarak yapılmıştır. Teorik hesaplamalarda DFT-B3LYP metoduyla 6-311++G(d,p) ve 6-31 G(d) baz setleri, HF metoduyla 6-31 G(d) baz seti kullanılmıştır. DFT-B3LYP metoduyla kullanılan 6-311++G(d,p) baz setinin fenilglioksim molekülünün titreşim frekansı hesabında en iyi performansı sergilediği bulunmuştur.

Keywords

Titreşim Spektroskopisi, Frekans hesaplamaları, ab initio metotları

Vibrational Analysis of Phenylglyoxime Molecule

Abstract

In this study, the agreement between the experimental and the calculated vibrational frequencies of phenilglyoxime molecule was investigated. The geometrical optimization and vibrational frequency calculations of this molecule were carried out by using ab initio methods. 6-31G(d) and 6-311++G(d,p) basis sets were used with DFTB3LYP method and 6-31 G(d) basis set was used with HF method for theoretical calculations. It was found that DFT-B3LYP method with 6-311++G(d,p) basis set is the most succesfull procedure for vibrational frequency calculations of phenilglyoxime molecule

Keywords

Vibrational spectroscopy, Frequency calculations, ab initio methods

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