bioex_lect16

bioex_lect16 - MIT OpenCourseWare http/ocw.mit.edu 5.111...

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MIT OpenCourseWare http://ocw.mit.edu 5.111 Principles of Chemical Science Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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Determining Hybridization in Complex Molecules: See lecture 15 notes for a detailed discussion of hybrid orbitals. See page 1 of lecture 16 notes for a general rule to predict the hybridization of atoms with s and p electrons. To determine the hybridization of a given atom in a molecule, (# of bonded atoms) + (# of lone pairs) = # of hybrid orbitals 2 hybrid orbitals- sp , 3 hybrid orbitals – sp 2 , 4 hybrid orbitals- sp 3 Exception: single-bonded, terminal atoms. For the purposes of this course, do NOT hybridize single, bonded, terminal atoms. Example 1) from page 1 of Lecture 16 notes: Identifying the hybridization and geometry of atoms in ascorbic acid (vitamin C) Identify the hybridization and C a : C d : C b : C c : entify the symmetry ( σ or π ) and name the hybrid or atomic orbitals that constitute the onds to carbon b: a σ (C2sp 3 , C2sp 3 ) b c Bonds to carbon d: c σ (C2sp 2 , C2sp 3 ) Some interesting facts about vitamin C: scorbate ion.
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bioex_lect16 - MIT OpenCourseWare http/ocw.mit.edu 5.111...

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