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12. (1) C60 Ih ×ÓȺ: D5d, D5, C5v, C5, D3h, D3, C3v, C3µÈ. (2) ¶þïÌúD5d,×ÓȺ D5, C5vµÈ. (3)¼×Íé Td, ×ÓȺC3v, C3, D2d, D2µÈ.

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13. ¢Ù C3O2 Ö±ÏßÐÎD¡Þh ¢ÚË«ÑõË® C2 ¢ÛNH2NH2 °°ÂíÐÍC2V ¢ÜF2O VÐÎ C2v ¢ÝNCCN ÏßÐÎ D¡Þh

14. ÒÑÖªÁ¬½Ó±½»·ÉÏC£­Cl¼ü¾ØΪ5.17¡Á10-30C¡¤m£¬C£­CH3¼ü¾ØΪ-1.34¡Á10-30C¡¤m£¬ÊÔÍÆËãÁÚλ¡¢¼äλ¡¢¶ÔλC6H4ClCH3µÄż¼«¾Ø£¨ÊµÑéÖµ·Ö±ðΪ4.15¡Á10-30¡¢5.49¡Á10-30¡¢6.34¡Á10-30C¡¤m£© 14. 8.7(ÁÚ), 5.0¡Á10-30C©qm (¼ä), 0 (¶Ô)

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16. ÒÑÖªC6H5Cl ºÍC6H5NO2ż¼«¾Ø·Ö±ðΪ1.55D ºÍ3.95D, ÊÔ¼ÆËãÏÂÁл¯ºÏÎïµÄż¼«¾Ø: (1) ÁÚ¶þÂȱ½ (2) ¼ä¶þÏõ»ù±½ (3) ¶ÔÏõ»ùÂȱ½ (4) ¼äÏõ»ùÂȱ½ (5) ÈýÏõ»ù±½

16. (1) 2.68D, (2) 3.95D, (3) 2.40D, (4) 3.45D, (5) 0 .

17 ÒÑÖªÁ¢·½ÍéC8H8ΪÁ¢·½Ìå¹¹ÐÍ£¬Èô2¸öH¡¢3¸öH·Ö±ðΪClÈ¡´ú£º ¢Ù Áгö¿ÉÐγɵÄC8H6Cl2¡¢C8H5Cl3¿ÉÄܵĹ¹ÐÍÓëËùÊôµÄµãȺ£» ¢Ú ÅбðÕâЩ¹¹ÐÍÓÐÎÞż¼«¾Ø¡¢Ðý¹âÐÔ¡£

17. C8H6Cl2 ¶þÂÈÔ­×Ó¿ÉÓÐÁÚ¡¢¼ä¡¢¶Ô3ÖÖ¹Øϵ£¬·Ö±ð¶ÔÓ¦ C2v£¬C2v£¬D3d¶Ô³ÆÐÔ C8H5Cl3 ÈýÂÈÔ­×ÓÒ²ÓÐ3ÖÖÅÅÁз½Ê½, ·Ö±ðÊôÓÚC3v,Cs,CsµãȺ. 18 ÏÂÁзÖ×Ó¾ßÓÐż¼«¾Ø£¬¶ø²»ÊôÓÚCnvȺµÄÊÇ ¢Ù H2O2 ¢Ú NH3 ¢Û CH2Cl2 ¢ÜH2C=CH2 18. H2O2

19 ÓÉÏÂÁзÖ×ӵĿ¼«¾ØÊý¾Ý£¬ÍƲâ·Ö×ÓµÄÁ¢Ìå¹¹Ðͼ°ËùÊôµÄµãȺ

¢ÅCS2 ¢ÆSO2 ¢ÇPCl5 ¦Ì=0 ¦Ì=1.62D ¦Ì=0 ¢ÈN2O ¢ÉO2N£­NO2 ¢ÊH2N£­NH2 ¦Ì=0.166D ¦Ì=0 ¦Ì=1.84D 19. (1)CS2:Ö±ÏßÐÎ,D¡Þh; (2)SO2:VÐÎ,C2v; (3)PCl5: Èý½Ç˫׶,D3h ;(4)N2O C£¤v (5)O2N-NO2 :ƽÃæÐÎ,D2h; (6)NH2-NH2, ׶ÐÎ,C2v.

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20. (1)Óм«ÐÔ¼°Ðý¹âÐÔ: ÈéËá

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21. ¶ÔD6µãȺÇó³ö¸÷±íʾµÄÖ±»ý£¬²¢È·¶¨×é³ÉËüÃǵIJ»¿ÉÔ¼±íʾ A1¡ÁA2£¬ A1¡ÁB1£¬ B1¡ÁB2£¬ E1¡ÁE2 21. A1UA2=A2 ; A1UB1=B1 ;B1UB2=A2 ; E1UE2=E1?B1?

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