Al +H,+H3+H ) 2 PI=PH (3H1-H2-H3-H) √12 吃=B2=1 (3H2-H1-H3-H) 12 n=1H13=-(3H3-H2-FH1-H1 12 ;=P,H4 3H-H-H-H 12 20218/21 Chemistry Departme nt of Fudan UniversityPhysical ChemistryI Chapter V Polyatomic Molecular Structure 2021/8/21 Chemistry Department of Fudan University 6 ( ) 1 1 2 3 4 1 3 12 1 2 2 T = P ˆ T H = H − H − H − H ( ) 2 2 1 3 4 2 3 12 1 2 2 T = P ˆ T H = H − H − H − H ( ) 3 3 2 1 4 3 3 12 1 2 2 T = P ˆ T H = H − H − H − H ( ) 4 4 2 3 1 4 3 12 1 2 2 T = P ˆ T H = H − H − H − H ( ) 1 1 2 3 4 2 1 1 1  A = P ˆ A H = H + H + H + H