{"id":37,"date":"2023-07-26T18:22:46","date_gmt":"2023-07-26T18:22:46","guid":{"rendered":"https:\/\/chemuza.org\/pt\/estrutura-bh3-lewis\/"},"modified":"2023-07-26T18:22:46","modified_gmt":"2023-07-26T18:22:46","slug":"estrutura-bh3-lewis","status":"publish","type":"post","link":"https:\/\/chemuza.org\/pt\/estrutura-bh3-lewis\/","title":{"rendered":"Estrutura bh3 lewis em 5 etapas (com fotos)"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"650\" height=\"447\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/structure-bh3-lewis.jpg\" alt=\"Estrutura de Lewis BH3\" class=\"wp-image-621\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Ent\u00e3o voc\u00ea j\u00e1 viu a imagem acima, certo?<\/p>\n<p> Deixe-me explicar brevemente a imagem acima.<\/p>\n<p> <strong><em><mark style=\"background-color:rgba(0, 0, 0, 0);color:#ff0000\" class=\"has-inline-color\">A estrutura BH3 Lewis possui um \u00e1tomo de boro (B) no centro que \u00e9 cercado por tr\u00eas \u00e1tomos de hidrog\u00eanio (H). Existem 3 liga\u00e7\u00f5es simples entre o \u00e1tomo de boro (B) e cada \u00e1tomo de hidrog\u00eanio (H).<\/mark><\/em><\/strong><\/p>\n<p> Se voc\u00ea n\u00e3o entendeu nada da imagem acima da estrutura de Lewis de BH3, fique comigo e voc\u00ea obter\u00e1 uma explica\u00e7\u00e3o detalhada passo a passo sobre como desenhar uma estrutura de Lewis de <a href=\"http:\/\/www.chemspider.com\/Chemical-Structure.6091.html\" target=\"_blank\" rel=\"noopener\">BH3<\/a> .<\/p>\n<p> Ent\u00e3o, vamos prosseguir para as etapas de desenho da <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">estrutura de Lewis<\/a> de BH3.<\/p>\n<h2 class=\"wp-block-heading\"> <strong>Etapas de desenho da estrutura BH3 Lewis<\/strong><\/h2>\n<h3 class=\"wp-block-heading\"> <strong>Etapa 1: Encontre o n\u00famero total de el\u00e9trons de val\u00eancia na mol\u00e9cula BH3<\/strong><\/h3>\n<p> Para encontrar o n\u00famero total <a href=\"https:\/\/www.nde-ed.org\/Physics\/AtomElements\/electrons.xhtml\" target=\"_blank\" rel=\"noopener\">de el\u00e9trons de val\u00eancia<\/a> <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">na mol\u00e9cula BH3<\/a> , primeiro voc\u00ea precisa conhecer os el\u00e9trons de val\u00eancia presentes <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">no \u00e1tomo de boro<\/a> , bem como no \u00e1tomo de hidrog\u00eanio.<br \/> (El\u00e9trons de val\u00eancia s\u00e3o os el\u00e9trons presentes na <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">\u00f3rbita<\/a> mais externa de qualquer \u00e1tomo.)<\/p>\n<p> Aqui vou lhe dizer como encontrar facilmente os el\u00e9trons de val\u00eancia do boro e tamb\u00e9m do hidrog\u00eanio usando uma <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">tabela peri\u00f3dica<\/a> .<\/p>\n<p class=\"has-medium-font-size\"> <strong>El\u00e9trons totais de val\u00eancia na mol\u00e9cula BH3<\/strong><\/p>\n<p> <strong>\u2192 El\u00e9trons de val\u00eancia dados pelo \u00e1tomo de boro:<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"303\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/2-6.jpg\" alt=\"\" class=\"wp-image-193\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">O boro<\/a> \u00e9 um elemento <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">do grupo 13<\/a> da tabela peri\u00f3dica. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Boron\" target=\"_blank\" rel=\"noopener\"><sup>[1]<\/sup><\/a> Portanto, os el\u00e9trons de val\u00eancia presentes no boro s\u00e3o <strong>3<\/strong> . <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"220\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/3-6.jpg\" alt=\"\" class=\"wp-image-194\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Voc\u00ea pode ver os 3 el\u00e9trons de val\u00eancia presentes no \u00e1tomo de boro, conforme mostrado na imagem acima.<\/p>\n<p> <strong>\u2192 El\u00e9trons de val\u00eancia dados pelo \u00e1tomo de hidrog\u00eanio:<\/strong> <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"300\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/3.jpg\" alt=\"\" class=\"wp-image-27\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> O hidrog\u00eanio \u00e9 um elemento do <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">grupo 1<\/a> da tabela peri\u00f3dica. <a href=\"https:\/\/pubchem.ncbi.nlm.nih.gov\/element\/1\" target=\"_blank\" rel=\"noopener\"><sup>[1]<\/sup><\/a> Portanto, o el\u00e9tron de val\u00eancia presente no hidrog\u00eanio \u00e9 <strong>1<\/strong> . <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"177\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/4.jpg\" alt=\"\" class=\"wp-image-28\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Voc\u00ea pode ver que apenas um el\u00e9tron de val\u00eancia est\u00e1 presente no \u00e1tomo de hidrog\u00eanio, conforme mostrado na imagem acima.<\/p>\n<p> Ent\u00e3o,<\/p>\n<p> <strong>Total de el\u00e9trons de val\u00eancia na mol\u00e9cula BH3<\/strong> = el\u00e9trons de val\u00eancia doados por 1 \u00e1tomo de boro + el\u00e9trons de val\u00eancia doados por 3 \u00e1tomos de hidrog\u00eanio = <strong>3 + 1(3) = 6<\/strong> .<\/p>\n<h3 class=\"wp-block-heading\"> <strong>Passo 2: Selecione o \u00e1tomo central<\/strong><\/h3>\n<p> Para selecionar o \u00e1tomo central, devemos lembrar que o \u00e1tomo menos <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">eletronegativo<\/a> permanece no centro.<\/p>\n<p> <strong>(Lembre-se:<\/strong> se houver <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">hidrog\u00eanio<\/a> em determinada mol\u00e9cula, sempre coloque hidrog\u00eanio do lado de fora.)<\/p>\n<p> Agora, aqui a mol\u00e9cula dada \u00e9 BH3 e cont\u00e9m \u00e1tomos de boro (B) e \u00e1tomos de hidrog\u00eanio (H). <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"800\" height=\"478\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/5.jpg\" alt=\"\" class=\"wp-image-29\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Voc\u00ea pode ver os valores de eletronegatividade do \u00e1tomo de boro (B) e do \u00e1tomo de hidrog\u00eanio (H) na tabela peri\u00f3dica acima.<\/p>\n<p> Se compararmos os valores de eletronegatividade do boro (B) e do hidrog\u00eanio (H), ent\u00e3o o <a href=\"https:\/\/chemuza.org\/pt\/eletronegatividade-da-tabela-periodica\/\">\u00e1tomo de hidrog\u00eanio \u00e9 menos eletronegativo<\/a> . Mas de acordo com a regra temos que manter o hidrog\u00e9nio do lado de fora.<\/p>\n<p> Aqui, o \u00e1tomo de boro (B) \u00e9 o \u00e1tomo central e os \u00e1tomos de hidrog\u00eanio (H) s\u00e3o os \u00e1tomos externos. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"149\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/bh3-etape-1.webp\" alt=\"BH3 etapa 1\" class=\"wp-image-622\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<h3 class=\"wp-block-heading\"> <strong>Etapa 3: Conecte cada \u00e1tomo colocando um par de el\u00e9trons entre eles<\/strong><\/h3>\n<p> Agora na mol\u00e9cula BH3 voc\u00ea precisa colocar os pares de el\u00e9trons entre o \u00e1tomo de boro (B) e os \u00e1tomos de hidrog\u00eanio (H). <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"150\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/bh3-etape-2.webp\" alt=\"BH3 est\u00e1gio 2\" class=\"wp-image-623\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Isso indica que o boro (B) e o hidrog\u00eanio (H) est\u00e3o <a href=\"https:\/\/www.sydney.edu.au\/science\/chemistry\/~george\/1611\/ChemicalBonding.pdf\" target=\"_blank\" rel=\"noopener\">quimicamente ligados<\/a> entre si em uma mol\u00e9cula de BH3.<\/p>\n<h3 class=\"wp-block-heading\"> <strong>Etapa 4: tornar os \u00e1tomos externos est\u00e1veis<\/strong><\/h3>\n<p> Nesta etapa voc\u00ea precisa verificar a estabilidade dos \u00e1tomos externos.<\/p>\n<p> Aqui no esbo\u00e7o da mol\u00e9cula BH3 voc\u00ea pode ver que os \u00e1tomos externos s\u00e3o \u00e1tomos de hidrog\u00eanio.<\/p>\n<p> Esses \u00e1tomos de hidrog\u00eanio externos formam um <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">dupleto<\/a> e, portanto, s\u00e3o est\u00e1veis. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"294\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/bh3-etape-3.webp\" alt=\"BH3 etapa 3\" class=\"wp-image-624\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Al\u00e9m disso, na etapa 1, calculamos o n\u00famero total de el\u00e9trons de val\u00eancia presentes na mol\u00e9cula BH3.<\/p>\n<p> A mol\u00e9cula de NH3 tem um total <strong>de 6 el\u00e9trons de val\u00eancia<\/strong> e todos esses el\u00e9trons de val\u00eancia s\u00e3o usados no diagrama de BH3 acima.<\/p>\n<p> Portanto, n\u00e3o h\u00e1 mais pares de el\u00e9trons para manter no \u00e1tomo central.<\/p>\n<p> Ent\u00e3o agora vamos para a pr\u00f3xima etapa.<\/p>\n<h3 class=\"wp-block-heading\"> <strong>Passo 5: Verifique a estabilidade da estrutura de Lewis<\/strong><\/h3>\n<p> Agora voc\u00ea chegou \u00e0 \u00faltima etapa em que precisa verificar a estabilidade da estrutura de Lewis do BH3.<\/p>\n<p> A estabilidade da estrutura de Lewis pode ser verificada usando um conceito <a href=\"https:\/\/pressbooks-dev.oer.hawaii.edu\/chemistry\/chapter\/formal-charges-and-resonance\/\" target=\"_blank\" rel=\"noopener\">formal de carga<\/a> .<\/p>\n<p> Resumindo, devemos agora encontrar a carga formal nos \u00e1tomos de boro (B), bem como nos \u00e1tomos de hidrog\u00eanio (H) presentes na mol\u00e9cula BH3.<\/p>\n<p> Para calcular o imposto formal, deve-se utilizar a seguinte f\u00f3rmula:<\/p>\n<p class=\"has-background\" style=\"background-color:#ffe9cf\"> <strong>Carga formal = El\u00e9trons de val\u00eancia \u2013 (El\u00e9trons ligantes)\/2 \u2013 El\u00e9trons n\u00e3o ligantes<\/strong><\/p>\n<p> Voc\u00ea pode ver o n\u00famero de <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">el\u00e9trons ligantes<\/a> e <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">el\u00e9trons n\u00e3o ligantes<\/a> para cada \u00e1tomo da mol\u00e9cula BH3 na imagem abaixo. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"168\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/bh3-etape-4.webp\" alt=\"BH3 etapa 4\" class=\"wp-image-625\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> <strong>Para o \u00e1tomo de boro (B):<\/strong><strong><br \/><\/strong> El\u00e9trons de val\u00eancia = 3 (porque o boro est\u00e1 no grupo 13)<br \/> El\u00e9trons de liga\u00e7\u00e3o = 6<br \/> El\u00e9trons n\u00e3o ligantes = 0<\/p>\n<p> <strong>Para o \u00e1tomo de hidrog\u00eanio (H):<\/strong><br \/> El\u00e9tron de val\u00eancia = 1 (porque o hidrog\u00eanio est\u00e1 no grupo 1)<br \/> El\u00e9trons de liga\u00e7\u00e3o = 2<br \/> El\u00e9trons n\u00e3o ligantes = 0 <\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"> <strong>Acusa\u00e7\u00e3o formal<\/strong><\/td>\n<td> <strong>=<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> <strong>el\u00e9trons de val\u00eancia<\/strong><\/td>\n<td> <strong>\u2013<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> <strong>(El\u00e9trons de liga\u00e7\u00e3o)\/2<\/strong><\/td>\n<td> <strong>\u2013<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> <strong>El\u00e9trons n\u00e3o ligantes<\/strong> <\/td>\n<td><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"> B<\/td>\n<td> =<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 3<\/td>\n<td> \u2013<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 6\/2<\/td>\n<td> \u2013<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 0<\/td>\n<td> =<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> <strong>0<\/strong><\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"> H<\/td>\n<td> =<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 1<\/td>\n<td> \u2013<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 2\/2<\/td>\n<td> \u2013<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 0<\/td>\n<td> =<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> <strong>0<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p> A partir dos c\u00e1lculos de carga formal acima, voc\u00ea pode ver que o <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">\u00e1tomo de boro (B),<\/a> assim como <a href=\"https:\/\/chemuza.org\/pt\/definicoes-basicas-de-quimica\/\">o \u00e1tomo de hidrog\u00eanio (H),<\/a> t\u00eam carga formal <strong>\u201czero\u201d<\/strong> .<\/p>\n<p> Isto indica que a estrutura de Lewis de BH3 acima \u00e9 est\u00e1vel e n\u00e3o h\u00e1 mais altera\u00e7\u00f5es na estrutura de BH3 acima.<\/p>\n<p> Na estrutura de pontos de Lewis de BH3 acima, voc\u00ea tamb\u00e9m pode representar cada par de el\u00e9trons de liga\u00e7\u00e3o (:) como uma liga\u00e7\u00e3o simples (|). Fazer isso resultar\u00e1 na seguinte estrutura de Lewis de BH3. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"244\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/structure-de-Lewis-de-bh3.jpg\" alt=\"Estrutura de Lewis de BH3\" class=\"wp-image-626\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<p> Espero que voc\u00ea tenha entendido completamente todas as etapas acima.<\/p>\n<p> Para mais pr\u00e1tica e melhor compreens\u00e3o, voc\u00ea pode tentar outras estruturas de Lewis listadas abaixo.<\/p>\n<style>\n.wp-block-table table, .wp-block-table td, .wp-block-table th {\n    border: 0;\n}\n<\/style>\n<p><strong>Experimente (ou pelo menos veja) estas estruturas de Lewis para uma melhor compreens\u00e3o:<\/strong><\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <a href=\"https:\/\/chemuza.org\/pt\/estrutura-cocl2-lewis\/\">Estrutura de Lewis COCl2<\/a><\/td>\n<td> <a href=\"https:\/\/chemuza.org\/pt\/estrutura-de-lewis-brf5\/\">Estrutura BrF5 Lewis<\/a><\/td>\n<\/tr>\n<tr>\n<td> <a href=\"https:\/\/chemuza.org\/pt\/estrutura-de-lewis-ncl3\/\">Estrutura de Lewis NCl3<\/a><\/td>\n<td> <a href=\"https:\/\/chemuza.org\/pt\/estrutura-chcl3-lewis\/\">Estrutura de Lewis CHCl3<\/a><\/td>\n<\/tr>\n<tr>\n<td> <a href=\"https:\/\/chemuza.org\/pt\/estrutura-de-lewis-brf3\/\">Estrutura BrF3 Lewis<\/a><\/td>\n<td> <a href=\"https:\/\/chemuza.org\/pt\/estrutura-de-lewis-sf2\/\">Estrutura SF2 Lewis<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Ent\u00e3o voc\u00ea j\u00e1 viu a imagem acima, certo? Deixe-me explicar brevemente a imagem acima. A estrutura BH3 Lewis possui um \u00e1tomo de boro (B) no centro que \u00e9 cercado por tr\u00eas \u00e1tomos de hidrog\u00eanio (H). Existem 3 liga\u00e7\u00f5es simples entre o \u00e1tomo de boro (B) e cada \u00e1tomo de hidrog\u00eanio (H). Se voc\u00ea n\u00e3o entendeu &#8230; <a title=\"Estrutura bh3 lewis em 5 etapas (com fotos)\" class=\"read-more\" href=\"https:\/\/chemuza.org\/pt\/estrutura-bh3-lewis\/\" aria-label=\"Mais em Estrutura bh3 lewis em 5 etapas (com fotos)\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-37","post","type-post","status-publish","format-standard","hentry","category-estrutura-de-lewis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Estrutura BH3 Lewis em 5 etapas (com fotos) - Chemuza<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/chemuza.org\/pt\/estrutura-bh3-lewis\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Estrutura BH3 Lewis em 5 etapas (com fotos) - Chemuza\" \/>\n<meta property=\"og:description\" content=\"Ent\u00e3o voc\u00ea j\u00e1 viu a imagem acima, certo? Deixe-me explicar brevemente a imagem acima. A estrutura BH3 Lewis possui um \u00e1tomo de boro (B) no centro que \u00e9 cercado por tr\u00eas \u00e1tomos de hidrog\u00eanio (H). Existem 3 liga\u00e7\u00f5es simples entre o \u00e1tomo de boro (B) e cada \u00e1tomo de hidrog\u00eanio (H). Se voc\u00ea n\u00e3o entendeu ... 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