Molecular structure optimization energy and IR calculations of photochemical generated chromium metal carbonyl using the density function theory (DFT)‎ method

مقدم أطروحة جامعية

Shalahdah, Zuhayr

مشرف أطروحة جامعية

Awad, Hani

أعضاء اللجنة

Qarain, Wail
Hamid, Mazin Y.
Dib, Umar

الجامعة

جامعة بيرزيت

الكلية

كلية الهندسة و التكنولوجيا

القسم الأكاديمي

دائرة علم الحاسوب

دولة الجامعة

فلسطين (الضفة الغربية)

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2005

الملخص الإنجليزي

The Geometries, electronic structures and vibration frequencies of Cr (CO) 6, Cr (CO) 5 pip, were studied using the HartreeFock and B3LYP density functional level of theory combined with various basis sets.

These methods have been implemented in the Gaussian 98 program.

Comparison with experimental data shows that density functional theory with triple split valence polarized 6-311G (D) basis set gives good results for the structures and vibration frequencies of such compounds.

The discrepancy between experimental and theoretical values results from the description of the wave function by a finite number of functions (basis sets).

This introduces an approximation into the calculations since an infinite number of Gaussian functions would be needed to describe the wave function exactly.

The same calculations have been performed on a series of carbonyl chromium complexes, of the type trans-(chlorobenzene (L) Cr (CO) 4, where L = CO, PH3, PCl3 and PF3.

The aim of this project is to explore the effect of these ligands on the Cr-Cl bond.

The influences of the L ligands on the properties of these complexes are compared with the behavior of the carbonyl complex Cr (CO) 6.

The largest effect observed on the Cr-Cl bond is when L = CO.

As the π back-bonding ability of the ligand Trans to chlorobenzene increases, the Cr-Cl bond distance increases.

This effect in the octahedral complexes is similar to the Trans effect in square Planar complexes.

The calculated IR frequencies in these complexes are in good agreement with the reported experimental IR values.

التخصصات الرئيسية

الكيمياء

عدد الصفحات

107

قائمة المحتويات

Abstract.

Table of contents.

Chapter one : Introduction.

Chapter two : Overview of the used computational methods.

Chapter three : Software packages and computational methodology.

Chapter four : Reactivity and bonding of metal carbonyl complexes.

Chapter five : Results and discussion.

References.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Shalahdah, Zuhayr. (2005). Molecular structure optimization energy and IR calculations of photochemical generated chromium metal carbonyl using the density function theory (DFT) method. (Master's theses Theses and Dissertations Master). Birzeit University, Palestine (West Bank)
https://search.emarefa.net/detail/BIM-303398

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Shalahdah, Zuhayr. Molecular structure optimization energy and IR calculations of photochemical generated chromium metal carbonyl using the density function theory (DFT) method. (Master's theses Theses and Dissertations Master). Birzeit University. (2005).
https://search.emarefa.net/detail/BIM-303398

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Shalahdah, Zuhayr. (2005). Molecular structure optimization energy and IR calculations of photochemical generated chromium metal carbonyl using the density function theory (DFT) method. (Master's theses Theses and Dissertations Master). Birzeit University, Palestine (West Bank)
https://search.emarefa.net/detail/BIM-303398

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-303398