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penguin2788

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[½»Á÷] ÓÐCIFºÍlistÎļþÈçºÎ¿´ÊÇÈçºÎ¼ÓÇ⣬s.u.sÊÇʲô£¿

¸÷λ³æÓÑÃÇÄãÃǺã¬ÎÒÊÇÐÂÊÖ£¬Ç°²»¾ÃÕÒÈ˸ø½âÁËÒ»¸ö¾§Ì壬ͶACTA  Cºó£¬±à¼­À´ÐÅThe exptl_refinement text does not agree with reality. The authors should
supply a correct text. The N-H and water H-atoms are riding, not refined.
The applied restraints are inactive because of the riding constraint. The
definition of U for N-H is not mentioned (1.2), the U for CH is wrong (1.2).
If indeed the NH and OH were found in difference maps and refined with
restraints, this is at least not what was done in the final cycles, so full and
correct details are required. The 6 restraints should be removed from the
CIF (incl. D flags in the coordinates) and the crystal data.
ÎÒµÄÕâ¸ö»¯ºÏÎïÓÐNH2£¬H2OºÍCH2£¬ÎÒ²»ÖªµÀÊÇÈçºÎ¼ÓÇâµÄ£¬µ±Ê±×Ô¼ºÃèÊöΪThe H atoms bonded to atoms N1 and N2 were located in a
difference map and refined freely. Water H atoms were located in a
difference Fourier map and their positions were refined with
geometric restraints of O¡ªH = 0.85 (1) A ˚ , with Uiso(H) = 1.5Ueq(O).
Other H atoms were placed in calculated positions, with C¡ªH =
0.97 A ˚ , and refined as riding, with Uiso(H) = 1.5Ueq(C).
¡£ÇëÎʸ÷λ³æÓÑ£¬ÎÒÏÖÔÚÓе±³õÇëÈ˽âµÄCIFÎļþºÍlist,resµÈÎļþÈçºÎ¿´³öÊÇÈçºÎ¼ÓÇâµÄ£¿ Uiso(H) = 1.5Ueq(O)Ö®ÀàµÄÓÖÈ¥ÄÄÀï¿´£¿
ÁíÍâÉó¸åÈË»¹Îʵ½£ºTable 3: "experimental error" implies some indication of s.u.s
should be given in Table 3, otherwise we do not have any idea if the values
are indeed inside or outside the error range, but the table does not have
s.u.s. Can s.u.s be included?
²»ÖªµÀs.u.sÊÇʲô£¿ÖªµÀµÄ³æÓѰïÖúһϡ£

[ Last edited by penguin2788 on 2009-9-17 at 19:50 ]
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monoclinic

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penguin2788(½ð±Ò+1,VIP+0):·Ç³£¸ÐлÄúµÄ°ïÖú 9-17 19:48
eeqeeq0002(½ð±Ò+1,VIP+0):лл²ÎÓë 9-17 19:53
penguin2788(½ð±Ò+4,VIP+0):ÒÔǰµÄÌû×Ó½ÓןøÄã½ð±Ò 11-12 13:27
ÓÐCIF¾Í¿ÉÒÔÁË¡£

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ÀíÂÛ¼ÓÇâʱ³ÌÐòĬÈϼü³¤Öµ£¬³£¹æµÄÈ磺sp1--0.98, sp2--0.97, sp3--0.96, N-H 0.86, NH20.90, -O-H 0.85,  OH2 0.82µÈµÈ¡£
¿´¿´CIFÖÐÇâµÄ¼ü³¤ÊDz»ÊÇÕâÑùµÄ¹Ì¶¨Öµ£¬Èç¹ûÊÇÔòÊÇÀíÂÛ¼ÓÇ⣬Èç¹û²»ÊÇ
£¨±ÈÈç O--H  0.8225 £©¾ÍÊDzîÖµ¼ÓÇâ¡£

ÔÚCIFµÄÔ­×ÓÁбíÀ ÔªËØÖÖÀàºóÃæµÄµÚËÄÏîÊÇÔ­×ÓµÄζÈÓ°×ÓU£¬È磺
O5 O 0.16193(14) 0.0846(2) 0.42483(6) 0.0589(4) Uani 1 1 d . . .
H51 H 0.0784 0.0284 0.4131 0.088 Uiso 1 1 d R . .
H52 H 0.1958 0.1663 0.4021 0.088 Uiso 1 1 d R . .
ÓÃHµÄU£¨Àý0.088£©³ýÒÔOµÄU£¨Àý0.0589£©£¬¿ÉÒÔËã³öUiso(H)µÄ±¶ÂÊÊǶàÉÙ¡£

s.u.sÊÇÆ«²î

[ Last edited by monoclinic on 2009-9-17 at 20:10 ]
2Â¥2009-09-17 18:37:22
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penguin2788

½ð³æ (СÓÐÃûÆø)

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