{"id":381,"date":"2023-07-23T18:24:17","date_gmt":"2023-07-23T18:24:17","guid":{"rendered":"https:\/\/chemuza.org\/pt\/tetrabrometo-de-diboro-b2br4\/"},"modified":"2023-07-23T18:24:17","modified_gmt":"2023-07-23T18:24:17","slug":"tetrabrometo-de-diboro-b2br4","status":"publish","type":"post","link":"https:\/\/chemuza.org\/pt\/tetrabrometo-de-diboro-b2br4\/","title":{"rendered":"Tetrabrometo de diboro \u2013 b2br4, 10294-34-5"},"content":{"rendered":"<p>Tetrabrometo de diboro (B2Br4) ou tetrabromo-1,2-diboraetano \u00e9 um composto qu\u00edmico que cont\u00e9m boro e bromo. \u00c9 um s\u00f3lido amarelo-marrom usado como intermedi\u00e1rio em s\u00edntese org\u00e2nica e como retardador de chama.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <strong>Nome IUPAC<\/strong><\/td>\n<td> Tetrabrometo de diboro<\/td>\n<\/tr>\n<tr>\n<td> <strong>F\u00f3rmula molecular<\/strong><\/td>\n<td> B2Br4<\/td>\n<\/tr>\n<tr>\n<td> <strong>N\u00famero CAS<\/strong><\/td>\n<td> 10294-34-5<\/td>\n<\/tr>\n<tr>\n<td> <strong>Sin\u00f4nimos<\/strong><\/td>\n<td> Di\u00f3xido de tribrometo de boro; Tetrabrometo de dibromoboro; Di\u00f3xido de brometo de boro, tetrabromo-1,2-diboraetano<\/td>\n<\/tr>\n<tr>\n<td> <strong>InChI<\/strong><\/td>\n<td> InChI=1S\/2B.4BrH\/h21H;\/q2-2;;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"> <strong>Propriedades do tetrabrometo de diboro<\/strong><\/h2>\n<h3 class=\"wp-block-heading\"> F\u00f3rmula de Tetrabrometo de Diboro<\/h3>\n<p> A f\u00f3rmula qu\u00edmica do Tetrabrometo de Diboro \u00e9 B2Br4 ou Tetrabromo-1,2-diboraetano.<\/p>\n<h3 class=\"wp-block-heading\"> Massa molar de tetrabrometo de diboro<\/h3>\n<p> A massa molar do Tetrabromo-1,2-diboraetano (B2Br4) \u00e9 341,2 g\/mol. \u00c9 calculado somando as massas at\u00f4micas de cada elemento do composto, levando em considera\u00e7\u00e3o o n\u00famero de \u00e1tomos de cada elemento presente.<\/p>\n<h3 class=\"wp-block-heading\"> Ponto de ebuli\u00e7\u00e3o do tetrabrometo de diboro<\/h3>\n<p> O ponto de ebuli\u00e7\u00e3o do tetrabromo-1,2-diboraetano n\u00e3o \u00e9 amplamente divulgado na literatura cient\u00edfica. No entanto, sabe-se que o ponto de ebuli\u00e7\u00e3o dos compostos de boro em geral \u00e9 elevado devido \u00e0s fortes liga\u00e7\u00f5es covalentes entre os \u00e1tomos.<\/p>\n<h3 class=\"wp-block-heading\"> Ponto de fus\u00e3o do tetrabrometo de diboro<\/h3>\n<p> O ponto de fus\u00e3o do tetrabrometo de diboro \u00e9 de aproximadamente 105\u00b0C. Esta temperatura \u00e9 relativamente baixa em compara\u00e7\u00e3o com outros compostos de boro devido \u00e0s liga\u00e7\u00f5es relativamente fracas entre os \u00e1tomos de boro e bromo.<\/p>\n<h3 class=\"wp-block-heading\"> Densidade de tetrabromo-1,2-diboraetano g\/mL<\/h3>\n<p> A densidade do tetrabrometo de diboro n\u00e3o \u00e9 amplamente divulgada na literatura cient\u00edfica. No entanto, espera-se que seja um composto denso devido \u00e0 alta massa at\u00f4mica dos \u00e1tomos de boro e de bromo pesado.<\/p>\n<h3 class=\"wp-block-heading\"> Peso molecular do tetrabrometo de diboro <\/h3>\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/chemuza.org\/wp-content\/uploads\/2023\/08\/B2Br4.jpg\" alt=\"Tetrabrometo de diboro\" width=\"208\" height=\"153\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<\/div>\n<p> O peso molecular do B2Br4 \u00e9 341,2 g\/mol, calculado pela soma das massas at\u00f4micas de cada elemento do composto, levando em considera\u00e7\u00e3o o n\u00famero de \u00e1tomos de cada elemento presente.<\/p>\n<h3 class=\"wp-block-heading\"> Estrutura do tetrabromo-1,2-diboraetano<\/h3>\n<p> A estrutura do tetrabromo-1,2-diboraetano pode ser representada como B2Br4. Cont\u00e9m dois \u00e1tomos de boro e quatro \u00e1tomos de bromo, formando uma forma tetra\u00e9drica. Os \u00e1tomos de boro e bromo est\u00e3o ligados covalentemente, com os \u00e1tomos de bromo circundando os \u00e1tomos de boro em um arranjo tetra\u00e9drico.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <strong>Apar\u00eancia<\/strong><\/td>\n<td> S\u00f3lido amarelo-marrom<\/td>\n<\/tr>\n<tr>\n<td> <strong>Gravidade Espec\u00edfica<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Cor<\/strong><\/td>\n<td> Amarelo marrom<\/td>\n<\/tr>\n<tr>\n<td> <strong>Cheiro<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Massa molar<\/strong><\/td>\n<td> 341,2 g\/mol<\/td>\n<\/tr>\n<tr>\n<td> <strong>Densidade<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Ponto de fus\u00e3o<\/strong><\/td>\n<td> 105\u00baC<\/td>\n<\/tr>\n<tr>\n<td> <strong>Ponto de ebuli\u00e7\u00e3o<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Ponto flash<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Solubilidade em \u00c1gua<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Solubilidade<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Press\u00e3o de vapor<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>Densidade do vapor<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>pKa<\/strong><\/td>\n<td> N\u00e3o dispon\u00edvel<\/td>\n<\/tr>\n<tr>\n<td> <strong>pH<\/strong><\/td>\n<td> N\u00e3o aplic\u00e1vel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"> <strong>Seguran\u00e7a e perigos do tetrabromo-1,2-diboraetano<\/strong><\/h2>\n<p> O tetrabromo-1,2-diboraetano (B2Br4) \u00e9 considerado um produto qu\u00edmico perigoso e deve ser manuseado com cuidado. Pode irritar a pele e os olhos e causar problemas respirat\u00f3rios se inalado. Equipamento de prote\u00e7\u00e3o adequado, como luvas e prote\u00e7\u00e3o para os olhos, deve ser usado ao manusear o composto. O armazenamento em uma \u00e1rea bem ventilada e o descarte adequado s\u00e3o importantes para minimizar os riscos \u00e0s pessoas e ao meio ambiente. Recomenda-se consultar a Ficha de Dados de Seguran\u00e7a (SDS) para obter informa\u00e7\u00f5es detalhadas sobre o manuseio e descarte seguro do B2Br4.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td> <strong>S\u00edmbolos de perigo<\/strong><\/td>\n<td> Perigo<\/td>\n<\/tr>\n<tr>\n<td> <strong>Descri\u00e7\u00e3o de seguran\u00e7a<\/strong><\/td>\n<td> S26, S36\/37\/39, S45<\/td>\n<\/tr>\n<tr>\n<td> <strong>N\u00fameros de identifica\u00e7\u00e3o da ONU<\/strong><\/td>\n<td> UN3287<\/td>\n<\/tr>\n<tr>\n<td> <strong>C\u00f3digo SH<\/strong><\/td>\n<td> 2826.90.90<\/td>\n<\/tr>\n<tr>\n<td> <strong>Classe de perigo<\/strong><\/td>\n<td> 8<\/td>\n<\/tr>\n<tr>\n<td> <strong>Grupo de embalagem<\/strong><\/td>\n<td> III<\/td>\n<\/tr>\n<tr>\n<td> <strong>Toxicidade<\/strong><\/td>\n<td> Irritante, irritante respirat\u00f3rio<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"> <strong>M\u00e9todos para a s\u00edntese de tetrabrometo de diboro<\/strong><\/h2>\n<p> O tetrabromo-1,2-diboraetano (B2Br4) pode ser sintetizado por v\u00e1rios m\u00e9todos. Um m\u00e9todo comum envolve a rea\u00e7\u00e3o do tribrometo de boro (BBr3) com p\u00f3 de boro em um ambiente de alta temperatura. Esta rea\u00e7\u00e3o resulta na forma\u00e7\u00e3o de tetrabromo-1,2-diboraetano e boro elementar. Outro m\u00e9todo envolve a rea\u00e7\u00e3o de tricloreto de boro (BCl3) e brometo de hidrog\u00eanio (HBr) em ambiente de alta temperatura e baixa press\u00e3o, resultando na forma\u00e7\u00e3o de tetrabromo-1,2-diboraetano e cloreto de hidrog\u00eanio. hidrog\u00eanio (HCl). \u00c9 importante notar que estas rea\u00e7\u00f5es devem ser realizadas num ambiente laboratorial controlado com medidas de seguran\u00e7a adequadas para minimizar o risco para as pessoas e o ambiente.<\/p>\n<h2 class=\"wp-block-heading\"> <strong>Usos do tetrabromo-1,2-diboraetano<\/strong><\/h2>\n<p> Os setores industriais utilizam tetrabromo-1,2-diboraetano (B2Br4) por suas propriedades qu\u00edmicas. A subst\u00e2ncia atua como retardador de chama na produ\u00e7\u00e3o de materiais polim\u00e9ricos, t\u00eaxteis e eletr\u00f4nicos. Tamb\u00e9m atua como catalisador na produ\u00e7\u00e3o de brometos de alquila, que servem como intermedi\u00e1rios qu\u00edmicos para produtos farmac\u00eauticos, inseticidas e outros produtos. Al\u00e9m disso, o tetrabromo-1,2-diboraetano funciona como um lubrificante de alta temperatura em aplica\u00e7\u00f5es de alta tens\u00e3o, como conforma\u00e7\u00e3o de metal e processos de extrus\u00e3o. No entanto, o manuseio e descarte adequados devem ser realizados para minimizar riscos potenciais \u00e0s pessoas e ao meio ambiente.<\/p>\n<p class=\"has-small-font-size\"> <em>F\u00f3rmula qu\u00edmica do tetrabrometo de diboro<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tetrabrometo de diboro (B2Br4) ou tetrabromo-1,2-diboraetano \u00e9 um composto qu\u00edmico que cont\u00e9m boro e bromo. \u00c9 um s\u00f3lido amarelo-marrom usado como intermedi\u00e1rio em s\u00edntese org\u00e2nica e como retardador de chama. Nome IUPAC Tetrabrometo de diboro F\u00f3rmula molecular B2Br4 N\u00famero CAS 10294-34-5 Sin\u00f4nimos Di\u00f3xido de tribrometo de boro; Tetrabrometo de dibromoboro; Di\u00f3xido de brometo de boro, &#8230; <a title=\"Tetrabrometo de diboro \u2013 b2br4, 10294-34-5\" class=\"read-more\" href=\"https:\/\/chemuza.org\/pt\/tetrabrometo-de-diboro-b2br4\/\" aria-label=\"Mais em Tetrabrometo de diboro \u2013 b2br4, 10294-34-5\">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":[5],"tags":[],"class_list":["post-381","post","type-post","status-publish","format-standard","hentry","category-produtos-quimicos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Tetrabrometo de diboro - B2Br4, 10294-34-5<\/title>\n<meta name=\"description\" content=\"Tetrabrometo de diboro (B2Br4) \u00e9 um composto qu\u00edmico que cont\u00e9m boro e bromo. \u00c9 um s\u00f3lido amarelo-marrom e \u00e9 usado como intermedi\u00e1rio\" \/>\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\/tetrabrometo-de-diboro-b2br4\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tetrabrometo de diboro - 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