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[求助]
求助晶體投稿修改意見
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本人剛投一篇晶體學(xué)報(bào)E 編輯給了一些修改意見,請教高手指點(diǎn): >1. Your molecule contains no strong anomalous scatterers (atoms with Z>13). >Therefore, the Flack parameter' value is inconclusive and can not be refined. >You need to merge Friedel pairs, and continue the refinement, >prepare new CIF and new FCF. >You should mention it in Experimental section. >As example: > >_publ_section_exptl_refinement >; >... >In the absence of any significant >anomalous scatterers in the molecule, attempts to confirm the absolute >structure by refinement of the >Flack parameter in the presence of 1479 sets of Friedel >equivalents led to an inconclusive value of -1.1(17). Therefore, the Friedel pairs were >merged before the final >refinement and the absolute configuration was assigned to >correspond with that of the known chiral centres in a precursor >molecule, >which remained unchanged during the synthesis of the title compound. 后面這一塊是不是加到實(shí)驗(yàn)部分里面去 2. Edit properly the Comment, which contains a number of misprints. >Compare your crystal structure with the crystal structures of >related compounds - Cambridge database contains a number >of such compounds 這一條好像是讓我比較同類型的晶體結(jié)構(gòu),想請教怎么比較晶體的結(jié)構(gòu)? |
至尊木蟲 (職業(yè)作家)
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1. 是這樣。 但你要按他說的,在.ins中加merg 3, 把 Friedel 對 merg 掉,再重新修正 然后, 如果你確實(shí)能根據(jù)反應(yīng)原料來確定絕對構(gòu)型, 則實(shí)驗(yàn)部分就按編輯給的例子那樣寫。 如果無法確定絕對構(gòu)型, 則就如實(shí)寫無法確定。 同時(shí), 在cif中增加 _chemical_absolute_configuration syn(或 unk) 上述第一種情況填 syn, 未確定,填 unk 詳細(xì)見 http://www.iucr.org/__data/iucr/ ... _configuration.html 而且, 還要把 falck參數(shù)那一行刪除 2. CCDC中查詢到類似結(jié)構(gòu), 引用、比較。 一般先比較鍵長,鍵角,然后比較整體結(jié)構(gòu)。 |

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