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parins: ½ð±Ò+4, ·­ÒëEPI+1, ¡ïÓаïÖú, ¸Ðл 2015-08-07 15:19:30
parins(RXMCDM´ú·¢): ½ð±Ò+5 2015-08-15 21:41:57
±È½ÏÅäºÏÎï9 Óë ÆäËû ÅäºÏÎËáµÄ Åäλµã Ô½¶à£¬Ô½ÈÝÒ× Á´½Ó½ðÊôÔ­×Ó ÐÎ³É ´Ø£»±È½ÏÅäºÏÎï1,2,4 ºÍ ÅäºÏÎï3,5,6,10£¬ ôÈ»ù µÄλÖà Ã÷ÏÔ »á Ó°Ïì ÂÝÐýµÄ Ðγɣ¬¼äλ ôÈ»ù ÈÝÒ×ÐÎ³É ÂÝÐý£¬¶ÔλµÄ ôÈ»ù ²»ÈÝÒ× ÐÎ³É ÂÝÐý£¬±È½Ï3 ºÍ4£¬È¡´ú»ùµÄ λ×èЧӦ ͬÑù »áÓ°Ïì ÂÝÐýµÄ Ðγɣ¬ÓÉÓÚ Êå¶¡»ùµÄ λ×è ´óÓÚ -Br, ËùÒÔ Î»×èÔ½´ó£¬Ô½ ²»ÈÝÒ×ÐÎ³É ÂÝÐý¡£
Comparing the coordination compound 9 with other coordination compounds, we can see the more the acid coordination sites are, the more easily the metal atoms will be linked into atom cluster; Comparing the coordination compounds 1,2,4 with the coordination compounds 3,5,10, we can see the position of carboxy group will significantly affect the formation of helix, wherein ,the meta-position carboxy tends to form helix easily, while para-position carboxy does not; Comparing coordination compound 3 and 4, it can be seen that the steric effect of substituent group also affects the formation of helix. Since the steric effect of tertiary butyl is bigger than that of -Br, the bigger steric effect normally represents a bigger difficulty in forming helix.
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