Portmess Homework Solutions 27

Portmess Homework Solutions 27 - 21 CHEMICAL BONDING(a The...

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CHEMICAL BONDING 21 1.47 ( a ) The electron con f guration of N is 1 s 2 2 s 2 2 p x 1 2 p y 1 2 p z 1 . If the half- f lled 2 p x , 2 p y , and 2 p z orbitals are involved in bonding to H, then the unshared pair would correspond to the two electrons in the 2 s orbital. ( b ) The three p orbitals 2 p x , 2 p y , and 2 p z have their axes at right angles to one another. The H @ N @ H angles would therefore be 90 ° . 1.48 A bonding interaction exists when two orbitals overlap in phase with each other, that is, when the algebraic signs of their wave functions are the same in the region of overlap. The following orbital is a bonding orbital. It involves overlap of an s orbital with the lobe of a p orbital of the same sign. On the other hand, the overlap of an s orbital with the lobe of a p orbital of opposite sign is antibonding. Overlap in the manner shown next is nonbonding. Both the positive lobe and the negative lobe of the p orbital overlap with the spherically symmetrical s orbital. The bonding overlap between the s orbital and one lobe of the
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This note was uploaded on 09/20/2011 for the course CHM 2210 taught by Professor Reynolds during the Fall '01 term at University of Florida.

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