This book is designed to cover the "basic principles Hetero cyclic Chemistry, data analysis, Nomenclature of organic compounds and Hammet equation" Syllabus of M.Sc, B.Sc level courses and NEET, NET (National Eligibility Test), set (State Eligibility Test ) SLET (State Level Eligibility Test), GATE (Graduate Aptitude Test for Engineering), TIFR (Tata Institute of Fundamental Research), BARC (Atomic Research Center), NASA (National Aeronautics and Space Administration), NBRC (National Brain Research Center), NCBI (National Center for Biotechnology Information .info), CCMB (Center for Cellular and Molecular Biology), NCBS (National Center for Biological Science), IISC (Indian Institute of Science), ONGC (Oil Natural Gas Corporation), ordd (defense Research and Development Organization), AIIMS (All India Institute of Medical Sciences)NTPC (National Thermal Power Corporation), BEL (Bharat Electronics Limited), IGCAR (Indira Gandhi Center for Atomic Research), SPM (Syama Prasad Mukharji), etc. competitive examination.It consists of V Chapters such as Heterocyclic Chemistry, Data Analysis, and Nomenclature of organic compounds, Hammet equation, and Boranes, Carboranes.