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zixy

ר¼Ò¹ËÎÊ (ÖøÃûдÊÖ)

[ÇóÖú] Éó¸åÈË˵ÎÒµÄwR2ÖµºÍCIFÎļþ²»·ûºÏ£¬ÎÒÈÏΪûÓÐÎÊÌâѽ£¡

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7. The Rw values reported in Table 1 are not matched with the given CIF (wR2) in most of the cases. This is a very serious mistake and author should be very careful in reporting this as these are very important data for the crystal structure report.

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_diffrn_ambient_temperature       296(2)
_diffrn_radiation_wavelength      0.71073
_diffrn_radiation_type            MoK\a
_diffrn_radiation_source          'fine-focus sealed tube'
_diffrn_radiation_monochromator   graphite
_diffrn_measurement_device_type   'CCD area detector'
_diffrn_measurement_method        'phi and omega scans'
_diffrn_detector_area_resol_mean  ?
_diffrn_standards_number          ?
_diffrn_standards_interval_count  ?
_diffrn_standards_interval_time   ?
_diffrn_standards_decay_%         ?
_diffrn_reflns_number             6350
_diffrn_reflns_av_R_equivalents   0.0217
_diffrn_reflns_av_sigmaI/netI     0.0409
_diffrn_reflns_limit_h_min        -6
_diffrn_reflns_limit_h_max        11
_diffrn_reflns_limit_k_min        -12
_diffrn_reflns_limit_k_max        13
_diffrn_reflns_limit_l_min        -14
_diffrn_reflns_limit_l_max        14
_diffrn_reflns_theta_min          1.78
_diffrn_reflns_theta_max          24.99
_reflns_number_total              4072
_reflns_number_gt                 3740
_reflns_threshold_expression      >2sigma(I)
  
_computing_data_collection        'Bruker SMART'
_computing_cell_refinement        'Bruker SMART'
_computing_data_reduction         'Bruker SAINT'
_computing_structure_solution     'SHELXS-97 (Sheldrick, 1990)'
_computing_structure_refinement   'SHELXL-97 (Sheldrick, 1997)'
_computing_molecular_graphics     'Bruker SHELXTL'
_computing_publication_material   'Bruker SHELXTL'
  
_refine_special_details
;
Refinement of F^2^ against ALL reflections.  The weighted R-factor wR and
goodness of fit S are based on F^2^, conventional R-factors R are based
on F, with F set to zero for negative F^2^. The threshold expression of
F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is
not relevant to the choice of reflections for refinement.  R-factors based
on F^2^ are statistically about twice as large as those based on F, and R-
factors based on ALL data will be even larger.
;
  
_refine_ls_structure_factor_coef  Fsqd
_refine_ls_matrix_type            full
_refine_ls_weighting_scheme       calc
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1068P)^2^+3.6364P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_primary      direct
_atom_sites_solution_secondary    difmap
_atom_sites_solution_hydrogens    geom
_refine_ls_hydrogen_treatment     Constr
_refine_ls_extinction_method      none
_refine_ls_extinction_coef        ?
_refine_ls_number_reflns          4072
_refine_ls_number_parameters      336
_refine_ls_number_restraints      0
_refine_ls_R_factor_all           0.0439
_refine_ls_R_factor_gt            0.0358
_refine_ls_wR_factor_ref          0.1531
_refine_ls_wR_factor_gt           0.1167
_refine_ls_goodness_of_fit_ref    1.015
_refine_ls_restrained_S_all       1.015
_refine_ls_shift/su_max           0.040
_refine_ls_shift/su_mean          0.001


ÎÒÎÄÕÂÀïTableÀïµÄÊý¾Ý£º

Rint        0.0217
Ra, Rwb        0.0358, 0.1167


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zixy

ר¼Ò¹ËÎÊ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by ww6174 at 2013-07-21 19:54:53
Ra, Rwb        0.0358, 0.1167

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4Â¥2013-07-21 20:00:59
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ww6174

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zixy: ½ð±Ò+2, ¡ïÓаïÖú 2013-07-21 20:00:13
Ra, Rwb        0.0358, 0.1167

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ÄãÊǵ¥¾§½âµÄÊý¾ÝÂð£¿ÄÇÓ¦¸ÃÊÇR1ºÍWR2
3Â¥2013-07-21 19:54:53
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yytsnake

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

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zixy: ½ð±Ò+2, ¡ïÓаïÖú, лл²ÎÓë 2013-07-22 09:34:11
_refine_ls_wR_factor_ref          0.1531
_refine_ls_wR_factor_gt           0.1167
5Â¥2013-07-21 20:37:02
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zixy

ר¼Ò¹ËÎÊ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
5Â¥: Originally posted by yytsnake at 2013-07-21 20:37:02
_refine_ls_wR_factor_ref          0.1531
_refine_ls_wR_factor_gt           0.1167

yytsnakeÐֺã¬
ÎÒдµÄ±íÖУ¬ÎÒͨ³£¶¼ÊǰÑwR_factor_gt µ±×÷wR2µÄ£¬ÄѵÀÊÇwR_factor_ref Âð£¬

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6Â¥2013-07-22 09:33:51
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