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键数：直接数中心原子与其他原子形成的 σ 键（单键=1，双键=1，三键=1）",[328,1141,1142,1143,1213],{},"孤电子对数：",[453,1144,1146],{"className":1145,"jax":457},[456],[459,1147,1150],{"style":490,"xmlns":462,"width":1148,"height":492,"role":465,"focusable":466,"viewBox":1149},"35.733ex","0 -864.9 15794 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+ 1个N-C），孤电子对数=1",[806,1386],{},"\n价层电子对数=3+1=4 → ",[320,1389,1016],{},[328,1391,1392,1393,1278,1427,1429,1430,1284,1432],{},"苯（",[453,1394,1396],{"className":1395,"jax":457},[456],[459,1397,1400],{"style":773,"xmlns":462,"width":1398,"height":775,"role":465,"focusable":466,"viewBox":1399},"6.443ex","0 -750 2848 950",[469,1401,1402],{"stroke":471,"fill":471,"stroke-width":472,"transform":473},[469,1403,1404,1408,1415,1420],{"dataMmlNode":476},[469,1405,1406],{"dataMmlNode":500},[481,1407],{"dataC":1241,"d":1242},[469,1409,1410],{"dataMmlNode":796,"dataMjxTexclass":797,"transform":1245},[469,1411,1412],{"dataMmlNode":479},[550,1413,1414],{"dataVariant":552,"transform":473,"font-size":553,"font-family":554},"₆",[469,1416,1418],{"dataMmlNode":500,"transform":1417},"translate(1360,0)",[481,1419],{"dataC":914,"d":915},[469,1421,1423],{"dataMmlNode":796,"dataMjxTexclass":797,"transform":1422},"translate(2248,0)",[469,1424,1425],{"dataMmlNode":479},[550,1426,1414],{"dataVariant":552,"transform":473,"font-size":553,"font-family":554},[806,1428],{},"\n中心C原子：σ键数=3（2个C-C + 1个C-H），孤电子对数=0（1个电子参与大π键，不计入孤电子对）",[806,1431],{},[320,1433,889],{},[440,1435,1437],{"id":1436},"方法3已知分子空间构型反向推导法","方法3：已知分子空间构型（反向推导法）",[316,1439,1440],{},"根据分子实际构型，略去孤电子对后推导杂化类型：",[335,1442,1443,1455],{},[338,1444,1445],{},[341,1446,1447,1450,1452],{},[344,1448,1449],{},"分子空间构型",[344,1451,349],{},[344,1453,1454],{},"关键说明",[357,1456,1457,1466,1475,1486,1496],{},[341,1458,1459,1461,1463],{},[362,1460,370],{},[362,1462,367],{},[362,1464,1465],{},"无孤电子对（如CO₂）或含2对孤电子对（如I₃⁻）",[341,1467,1468,1470,1472],{},[362,1469,384],{},[362,1471,381],{},[362,1473,1474],{},"无孤电子对（如BF₃）",[341,1476,1477,1480,1483],{},[362,1478,1479],{},"V形（角形）",[362,1481,1482],{},"sp²或sp³",[362,1484,1485],{},"含1对孤电子对（如SO₂，sp²）或2对孤电子对（如H₂O，sp³）",[341,1487,1488,1491,1493],{},[362,1489,1490],{},"三角锥形",[362,1492,395],{},[362,1494,1495],{},"含1对孤电子对（如NH₃）",[341,1497,1498,1500,1502],{},[362,1499,398],{},[362,1501,395],{},[362,1503,1504],{},"无孤电子对（如CH₄）",[440,1506,1508],{"id":1507},"方法4等电子原理法快速判断","方法4：等电子原理法（快速判断）",[316,1510,1511],{},"原子总数相同、价电子总数相同的分子\u002F离子，中心原子杂化类型相同：",[325,1513,1514],{},[328,1515,1516],{},"示例：CO₂与N₂O（均为sp杂化）；CH₄与NH₄⁺（均为sp³杂化）；SO₄²⁻与PO₄³⁻（均为sp³杂化）",[440,1518,1520],{"id":1519},"方法5特殊结构记忆法避坑关键","方法5：特殊结构记忆法（避坑关键）",[325,1522,1523,1526,1529],{},[328,1524,1525],{},"含碳碳双键、碳氧双键、苯环的分子：中心原子多为sp²杂化（如HCHO、C₂H₄）",[328,1527,1528],{},"含碳碳三键、直线形结构的分子：中心原子多为sp杂化（如C₂H₂、CS₂）",[328,1530,1531,1532,1535,1536,1539],{},"配位化合物：",[431,1533,1534],{},"Cu(NH₃)₄","²⁺（平面正方形，dsp²杂化）、",[431,1537,1538],{},"Zn(NH₃)₄","²⁺（正四面体，sp³杂化）",[311,1541,1543],{"id":1542},"三高考易错点提醒","三、高考易错点提醒",[764,1545,1546,1549,1552,1620,1626],{},[328,1547,1548],{},"杂化轨道仅用于形成σ键和容纳孤电子对，π键由未杂化的p轨道形成（如乙烯中C原子sp²杂化后，剩余1个p轨道形成π键）；",[328,1550,1551],{},"价层电子对数计算时，双键\u002F三键只计1个σ键，不计π键电子对；",[328,1553,1554,1555,1619],{},"离子型化合物必须考虑电荷数（如SO₃²⁻：价层电子对数 = ",[453,1556,1558],{"className":1557,"jax":457},[456],[459,1559,1561],{"style":490,"xmlns":462,"width":943,"height":818,"role":465,"focusable":466,"viewBox":1560},"0 -868.9 7060.6 1213.9",[469,1562,1563],{"stroke":471,"fill":471,"stroke-width":472,"transform":473},[469,1564,1565,1569,1573,1611,1615],{"dataMmlNode":476},[469,1566,1567],{"dataMmlNode":518},[481,1568],{"dataC":828,"d":829},[469,1570,1571],{"dataMmlNode":479,"transform":832},[481,1572],{"dataC":510,"d":511},[469,1574,1575,1605,1609],{"dataMmlNode":514,"transform":837},[469,1576,1577,1581,1585,1589,1593,1597,1601],{"dataMmlNode":840,"transform":841},[469,1578,1579],{"dataMmlNode":518},[481,1580],{"dataC":846,"d":847},[469,1582,1583],{"dataMmlNode":479,"transform":850},[481,1584],{"dataC":588,"d":589},[469,1586,1587],{"dataMmlNode":518,"transform":855},[481,1588],{"dataC":828,"d":829},[469,1590,1591],{"dataMmlNode":500,"transform":860},[481,1592],{"dataC":600,"d":601},[469,1594,1595],{"dataMmlNode":518,"transform":865},[481,1596],{"dataC":529,"d":530},[469,1598,1599],{"dataMmlNode":479,"transform":988},[481,1600],{"dataC":510,"d":511},[469,1602,1603],{"dataMmlNode":518,"transform":993},[481,1604],{"dataC":529,"d":530},[469,1606,1607],{"dataMmlNode":518,"transform":998},[481,1608],{"dataC":529,"d":530},[532,1610],{"width":1003,"height":535,"x":536,"y":537},[469,1612,1613],{"dataMmlNode":479,"transform":1006},[481,1614],{"dataC":483,"d":484},[469,1616,1617],{"dataMmlNode":518,"transform":1011},[481,1618],{"dataC":954,"d":955},"，sp³杂化）；",[328,1621,1622,1623,1625],{},"过渡元素中心原子价电子数需包含nd电子（如Fe³⁺价电子数=5，",[431,1624,433],{},"³⁺中Fe为d²sp³杂化）；",[328,1627,1628],{},"注意“价层电子对构型”与“分子实际构型”的区别（如NH₃价层电子对构型为正四面体，实际构型为三角锥形）。",{"title":1630,"searchDepth":1631,"depth":1631,"links":1632},"",2,[1633,1634,1642],{"id":313,"depth":1631,"text":314},{"id":437,"depth":1631,"text":438,"children":1635},[1636,1638,1639,1640,1641],{"id":442,"depth":1637,"text":443},3,{"id":1129,"depth":1637,"text":1130},{"id":1436,"depth":1637,"text":1437},{"id":1507,"depth":1637,"text":1508},{"id":1519,"depth":1637,"text":1520},{"id":1542,"depth":1631,"text":1543},null,"md",{},true,{"title":35,"description":1630},"I0SaSaMOmILU7d2Ydzp7gJjHWRNjvMYwjOt4gX8YKsg",[1650,1652],{"title":31,"path":32,"stem":33,"description":1651,"children":-1},"介绍元素周期律与元素推断的考点，包括元素周期表结构、性质变化规律、氢化物稳定性、原子半径比较等。",{"title":46,"path":47,"stem":48,"description":1653,"children":-1},"介绍物质的聚集状态、晶体与非晶体的区别、晶体的特点如自范性和各向异性，以及晶胞的基本概念。",1778558882355]