Section I: Hydrogenation Reactions with Homogeneous Catalysts 1. A General Overview on Hydrogenation Catalytic Systems 2. Mechanism and Stereochemistry of Hydrogenation Reaction 3. Homogeneous Catalytic Hydrogenation of Alkenes, Alkynes, Allenes, Dienes, and Arenes 4. Hydrogenation of Esters with Homogeneous Catalysts 5. Homogeneous Hydrogenation of Olefins 6. Hydrogenation of Ketones by Homogeneous Catalysts 7. Homogeneous Hydrogenation of Imines 8. Homogeneous Hydrogenation of Aromatics and Heteroaromatics 9. Supported Hydrogenation Homogeneous Catalysts 10. Homogeneous Hydrogenation of Benzene to Cyclohexane 11. Homogeneous Transfer Hydrogenation Catalysed by Metal Complexes 12. Homogeneous Hydrogenation in Aqueous Systems 13. Chemical Reactor Design for Homogeneous Hydrogenation Processes 14. Environmental Impacts and Economic Assessment of Homogeneous Hydrogenation Processes Section II: Metathesis Reactions with Homogeneous Catalysts 15. An Introduction to Homogeneous Metathesis Catalysis 16. Rhenium As a Homogeneous Metathesis Catalyst 17. Olefin Metathesis Homogeneous Catalysts 18. Homogeneous Catalysts for Alkene Metathesis 19. Alkyne Metathesis Homogeneous Catalysis 20. Industrial Applications of Homogeneous Metathesis Reactions