Quantum Chemical Calculations of Organic Molecules . Part I . The Hckel method of molecular orbitals, written by a team of authors, is a fascinating and deep dive into the world of quantum chemistry and the molecular structure of organic compounds. This publication will become an indispensable assistant for students, graduate students and specialists in chemistry, seeking to master methods that allow them to predict the properties and behavior of molecules based on their electronic structure. In the first part of the book, the authors focus on the Hckel method of molecular orbitals, which is one of the fundamental tools in quantum chemistry. This method makes it possible to investigate -electron systems of organic molecules, which is especially important for understanding their reactivity and stability. The reader will learn how to apply this method to the analysis of various molecules, from simple alkenes to more complex aromatic compounds. The book not only provides a theoretical basis, but also includes many practical examples, which makes the material accessible and understandable. Each section is accompanied by detailed explanations, which allows the reader not only to learn the method, but also to understand its physical and chemical nature. This approach makes the book ideal for those who want not only to memorize the formulas, but also to understand more deeply how and why certain chemical processes work. Who can like this edition? First of all, students of chemical faculties who study quantum chemistry and molecular structure . However, more experienced specialists working in the field of organic chemistry, materials science or pharmaceuticals can also show interest in the book .. It will also be useful to teachers who are looking for quality material for their lectures and seminars. The topics raised in the book cover a wide range of issues, such as the theory of molecular orbitals, the interaction of electrons, and the influence of various factors on the stability of molecules. The book also touches on important aspects related to the prediction of reactivity and reaction mechanisms, making it relevant to current research in chemistry. The style of the authors is distinguished by clarity and logical presentation, which makes it easy to follow the course of thought and assimilate complex concepts. The team of authors consists of experienced scientists and teachers whose names are known in scientific circles. Their previous work is also devoted to various aspects of quantum chemistry and molecular physics, which adds value to this book. If you are looking for a literature on quantum chemistry that combines theory and practice, then "Quantum chemical calculations of organic molecules. Part I . The Hckel Molecular Orbital Method will be your reliable companion in the study of this fascinating science. This book will not only expand your knowledge, but also inspire new discoveries in the field of chemistry. Do not miss the opportunity to plunge into the world of molecular orbitals and discover new horizons in the understanding of organic molecules!