为什么三氧化硫的成键电子对数为3 谁能帮忙解释一下三氧化硫的成键方式？
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下图是具体的结构及诚键方式
因为硫的最外层电子数为6，氧的最外层电子数为2，所以成3个双键。
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绛旓細鍦ㄤ笁姘у寲纭垎瀛愪腑锛屼腑蹇冪～鍘熷瓙涓庝笁涓哀鍘熷瓙褰㈡垚涓変釜鍏变环閿鐢变簬纭師瀛愭渶澶栧眰鏈6涓數瀛愶紝骞朵笖娌℃湁瀛ょ數瀛愬锛屽洜姝ゅ叾浠峰眰鐢靛瓙瀵规暟涓3銆傝繖鎰忓懗鐫纭師瀛愰渶瑕侀噰鐢╯p2鏉傚寲鏉ュ舰鎴愪笁涓瓑浠风殑鏉傚寲杞ㄩ亾锛屼笌涓変釜姘у師瀛愬舰鎴愊冮敭銆傚湪sp2鏉傚寲杩囩▼涓紝纭師瀛愮殑涓涓猻杞ㄩ亾鍜屼袱涓猵杞ㄩ亾娣峰悎褰㈡垚涓変釜鏂扮殑鏉傚寲杞ㄩ亾锛岃繖浜涜建...
绛旓細纭负姝6浠凤紝姘т负璐熶簩浠凤紙鍙互杩欎箞鐪嬶級锛屼竴涓～姘ч敭鍏辩敤涓や釜鐢靛瓙锛屼笁涓氨鍏敤鍏釜銆傜浉鍏崇悊璁猴細鍒嗗瓙杞ㄩ亾鐞嗚锛圡O鐞嗚锛夋槸澶勭悊鍙屽師瀛愬垎瀛愬強澶氬師瀛愬垎瀛愮粨鏋勭殑涓绉嶆湁鏁堢殑杩戜技鏂规硶锛屾槸鍖栧閿悊璁虹殑閲嶈鍐呭銆傚畠涓庝环閿悊璁轰笉鍚岋紝鍚庤呯潃閲嶄簬鐢ㄥ師瀛愯建閬撶殑閲嶇粍鏉傚寲鎴愰敭鏉ョ悊瑙ｅ寲瀛︼紝鑰屽墠鑰呭垯娉ㄩ噸浜庡垎瀛愯建閬撶殑璁ょ煡...
绛旓細骞抽潰涓夎褰㈢粨鏋勶細涓夋哀鍖栫～锛岀～鏄痵p2鏉傚寲锛屽舰鎴3涓瓑浠穝p2杞ㄩ亾锛岄敭瑙120搴︼紝涓庢哀褰㈡垚涓涓猻igma閿紝骞朵笖鍜屾哀鍘熷瓙p杞ㄩ亾p-蟺鍏辫江褰㈡垚4涓績6鐢靛瓙鐨勭鍩熷ぇ蟺閿傚苟鏃犻厤浣嶉敭銆傛牴鎹甐SEPR鐞嗚锛屼笁姘у寲纭垎瀛愪腑未閿暟鏄3锛屽鐢靛瓙瀵规暟鏄0锛屾墍浠ヤ环灞傜數瀛愬鏁版槸 3+0=3锛岀┖闂存瀯鍨嬶細骞抽潰涓夎鍨.閿锛120掳銆
绛旓細渚濇嵁VSEPR鐞嗚锛SO3鐨鍒嗗瓙涓瓨鍦ㄤ笁涓冮敭鍜岄浂涓鐢靛瓙瀵癸紝浠峰眰鐢靛瓙瀵规暟涓3锛屽喅瀹氫簡鍏剁┖闂存瀯鍨嬩负骞抽潰涓夎褰傛瘡涓哀鍘熷瓙涓庣～鐨勏冮敭缁撳悎锛岃屽叾涓竴涓哀鍘熷瓙杩樹笌纭殑瀛ゅ鐢靛瓙褰㈡垚棰濆鐨勯厤浣嶉敭銆傝繖绉嶇粨鏋勫鑷村洓涓師瀛愬湪鍨傜洿鏂瑰悜涓婄殑鐢靛瓙鍏卞悓褰㈡垚浜嗕竴涓鍩熛閿紝寮哄寲浜嗗垎瀛愰棿鐨勭ǔ瀹氭у拰鐢靛瓙鍒嗗竷銆
绛旓細鏍规嵁VSEPR鐞嗚锛涓夋哀鍖栫～鍒嗗瓙涓 未閿暟鏄3锛屽鐢靛瓙瀵规暟鏄0銆傛墍浠ヤ环灞傜數瀛愬鏁版槸 3+0 = 3銆傜┖闂存瀯鍨嬶細骞抽潰涓夎鍨嬨傞敭瑙掞細120掳銆
绛旓細鐜板湪浠SO3涓渚嬶細鎴愰敭鏁=锛4*8-4*6锛/2=4 瀛ゅ鐢靛瓙鏁=锛4*6-4*2锛/2=8 鍏呭垎鍙戞尌浣犵殑鎯宠薄鍙互鍐欏嚭涓嬪垪3绉嶇粨鏋勬潵锛堝彧鏄灦瀛愶級鏍规嵁璁＄畻涓鍏辨湁4瀵鎴愰敭鐢靛瓙锛屼笂闈㈠凡缁忕粰鍑轰簡3瀵癸紝鍐嶅姞涓鏍归敭灏卞ソ浜嗐傜劧鍚庡啀鍔犱笂瀛ゅ鐢靛瓙锛屾敞鎰忓湪娣诲姞鐨勬椂鍊欒灏介噺婊¤冻8鐢靛瓙缁撴瀯锛1锛夋湁涓绉嶆儏鍐靛涓 浣嗘槸锛2锛...
绛旓細鏍规嵁VSEPR鐞嗚,涓夋哀鍖栫～鍒嗗瓙涓 未閿暟鏄3,瀛鐢靛瓙瀵规暟鏄0.鎵浠ヤ环灞傜數瀛愬鏁版槸 3+0 = 3.绌洪棿鏋勫瀷锛氬钩闈笁瑙掑瀷.閿锛120掳.
绛旓細涓夋哀鍖栫～鐨涓績鍘熷瓙鏄～ 瀹冪殑浠峰眰鐢靛瓙瀵规暟 涓3 璁＄畻锛 瑗挎牸鐜 閿 鐢靛瓙瀵规暟涓3锛堝嵆涓烘哀鍘熷瓙鐨勬暟鐩級 鍐嶅姞涓 瀛ょ數瀛愬鏁0.5锛6-2*3锛
