In search of enantioselective catalysts for the Henry reaction: are two metal centres better than one?
Constable, Edwin C.; Zhang, Guoqi; Housecroft, Catherine E.; Neuburger, Markus; Schaffner, Silvia; Woggon, Wolf-D.; New Journal of Chemistry 33 (2009) 1064–; doi:10.1039/b821995h

data_7051680
_publ_section_title
;
 In search of enantioselective catalysts for the Henry reaction: are
 two metal centres better than one?
;
_journal_issue                   5
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1064
_journal_paper_doi               10.1039/b821995h
_journal_volume                  33
_journal_year                    2009
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C20 H20 Cu N2 O4, H2 O'
_chemical_formula_sum            'C20 H22 Cu N2 O5'
_chemical_formula_weight         433.95
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             08-11-12
_audit_creation_method           CRYSTALS_ver_12.84
_cell_angle_alpha                90
_cell_angle_beta                 101.777(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.9835(3)
_cell_length_b                   20.8163(7)
_cell_length_c                   11.0230(4)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    173
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     1793.32(11)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1997-2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      173
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.033
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            55033
_diffrn_reflns_theta_full        31.024
_diffrn_reflns_theta_max         32.317
_diffrn_reflns_theta_min         1.957
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.255
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.79
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.607
_exptl_crystal_description       plate
_exptl_crystal_F_000             900
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.40
_refine_diff_density_min         -0.55
_refine_ls_abs_structure_details 'Flack (1983), 5916 Friedel-pairs'
_refine_ls_abs_structure_Flack   0.004(7)
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0676
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     506
_refine_ls_number_reflns         8548
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0411
_refine_ls_R_factor_gt           0.0235
_refine_ls_shift/su_max          0.015963
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
[weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
Method = Robust Weighting (Prince, 1982)
W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
A~i~ are:
0.427 0.370 0.253
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0370
_refine_ls_wR_factor_gt          0.0262
_refine_ls_wR_factor_ref         0.0262
_reflns_limit_h_max              11
_reflns_limit_h_min              -12
_reflns_limit_k_max              30
_reflns_limit_k_min              -30
_reflns_limit_l_max              16
_reflns_limit_l_min              0
_reflns_number_gt                8548
_reflns_number_total             12420
_reflns_threshold_expression     I>3.0\s(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_scale          0.23296(15)
_oxford_structure_analysis_title 'gq7_173k_0m in P2(1)'
_cod_data_source_file            b821995h.txt
_cod_data_source_block           gq7_173k
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_original_formula_sum        'C20 H22 Cu1 N2 O5'
_cod_database_code               7051680