●a Chapter vi Interaction between molecules Physical Chemistry 2021821 Chemistry Departme nt of Fudan Universit
Physical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 1 Physical Chemistry
●a Chapter VI Interaction between Molecules,2 86-1 Intermolecular interaction Weak interactions between molecules 1873--van der waals 1910 Noble prize in Physics 2021821 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 2 §6−1 Intermolecular interaction 1873---van der Waals 1910 Noble Prize in Physics Weak interactions between molecules
Physical Chemistry Chapter VI Interaction between Molecules,2 (1 Electrostatic interaction Keesom 1912 Dipole-dipole interactions between two polar molecules 2+2(40)2k7R] 2021821 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 3 (1) Electrostatic interaction Keesom 1912 Dipole-dipole interactions between two polar molecules 2 2 2 6 e 1 2 0 2 [ /(4 ) ] 3 E kTR = −
●a Chapter VI Interaction between Molecules,2 (2)Dipole-Induced-dipole interaction Debye 19201921 A molecule with permanent dipole can induce a dipole of a neighboring polarizability molecule(polarizability a). The interaction of the induced dipole with the permanent dipole can be written as: En=-(a12+a242)(40)2R 2021821 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 4 (2) Dipole-Induced-dipole interaction Debye 1920-1921 A molecule with permanent dipole can induce a dipole of a neighboring polarizability molecule (polarizability a). The interaction of the induced dipole with the permanent dipole can be written as: 2 2 2 6 p 1 2 2 1 0 E R = − + ( )/(4 ) a a
●a Chapter VI Interaction between Molecules,2 For similar molecules,ifa1=02=0,1=μ2=μ,then En=-202/(4e0)2R 2021821 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 5 For similar molecules, if a1=a2=a, 1=2=, then 2 2 6 p 0 E R = −2 / 4 a （ ）