Determine as geometrias usando a teoria vsepr. Indique o (s) ângulo (s) de ligação aproximado (s) em cada molécula e determine se cada molécula é polar ou não polar a) BCl3 b) PCl5 c) NCl3 d) SO3 e) XeF4 f) HBF2?
Responda:
Veja abaixo
Explicação:
a) "BCl"_3
Deixamos como exercício para o aluno fazer este.
b) "PCl"_5
Outro exercício, mas aqui está um link para o estrutura de "PBr"_5 para ajudá-lo.
c) "NCl"_3
(i) Lewis structure
https://cluster13-files.instructure.com/courses/986898/files/31116480/course%20files/003%20Chapter%209%20Chemical%20Bonding%20I%3A%20%20Lewis%20Theory/Electron%20Dot%20Structures/07048%20bbluejpg
(from usflearn.instructure.com)This is an "AX"_3"E" molecule.
(ii) Shape — Trigonal pyramid
http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401098305/ql7oh2p4szvm3yphhcp5png
(from www.answers.com)(iii) Bond angles — slightly less than 109.5°
(iv) Polarity — polar
(D) "SO"_3
(i) Lewis structure
(from gallery4share.com)This is an "AX"_3 system.
(ii) Shape — Trigonal planar
http://glencoe.mcgraw-hill.com/sites/dl/free/007874637x/514757/trigonal_planarjpg
(from www.suggestkeyword.com)(iii) Bond angles — 120°
(iv) Polarity — nonpolar
All bond dipoles cancel, therefore
e) "XeF"_4
(i) Lewis structure
http://images.tutorvista.com/cms/images/101/lewis-dot-structure-of-xef4png
(from chemistry.tutorvista.com)This is an "AX"_4"E"_2 structure.
(ii) Shape — square planar
![]()
(iii) Bond angles — 90°
(iv) Polarity — nonpolar
f) "HBF"_2
(i) Lewis structure
(from www.uwplatt.edu)This is an "AX"_3 structure.
(ii) Shape — Trigonal planar
(iii) Bond angles — Approximately 120°.
(iv) Polarity — polar