Solvent-dependent 4(4) square grid and 6(4).8(2) NbO frameworks formed by Cu(Pyac)2 (bis[3-(4-pyridyl)pentane-2,4-dionato]copper(II)).
Chen, Banglin; Fronczek, Frank R; Maverick, Andrew W; Chemical communications (Cambridge, England)  (2003) 2166–2167; doi:10.1039/b305457h

data_7103871
_publ_section_title
;
 Solvent-dependent 4(4) square grid and 6(4).8(2) NbO frameworks formed
 by Cu(Pyac)2 (bis[3-(4-pyridyl)pentane-2,4-dionato]copper(II)).
;
_journal_issue                   17
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              2166
_journal_page_last               2167
_journal_paper_doi               10.1039/b305457h
_journal_year                    2003
_chemical_compound_source        'local laboratory'
_chemical_formula_moiety         'C20 H20 Cu N2 O4, C5 H5 N'
_chemical_formula_sum            'C25 H25 Cu N3 O4'
_chemical_formula_weight         495.02
_chemical_name_common
;Bis(3-(4-pyridyl)-2,4-pentanedionato)copper(ii), pyridine
solvate
;
_chemical_name_systematic
;
Bis(3-(4-pyridyl)-2,4-pentanedionato)copper(II), pyridine solvate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 95.766(17)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.432(2)
_cell_length_b                   9.583(3)
_cell_length_c                   16.114(5)
_cell_measurement_reflns_used    2876
_cell_measurement_temperature    100
_cell_measurement_theta_max      32.0
_cell_measurement_theta_min      2.5
_cell_volume                     1141.8(6)
_computing_cell_refinement
'Denzo and Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius 1999)'
_computing_data_reduction
'Denzo and Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
'Direct_methods (SIR, Altomare, et al., 1994)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 0.937
_diffrn_measured_fraction_theta_max 0.937
_diffrn_measurement_device       'KappaCCD (with Oxford Cryostream)'
_diffrn_measurement_method       ' \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.033
_diffrn_reflns_av_sigmaI/netI    0.0633
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            15911
_diffrn_reflns_theta_full        32.0
_diffrn_reflns_theta_max         32.0
_diffrn_reflns_theta_min         2.9
_diffrn_standards_decay_%        <2
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.993
_exptl_absorpt_correction_T_max  0.888
_exptl_absorpt_correction_T_min  0.758
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL Scalepack (Otwinowski & Minor 1997)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.440
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             514
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.43
_refine_diff_density_min         -0.58
_refine_diff_density_rms         0.092
_refine_ls_extinction_coef       0.0040(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     153
_refine_ls_number_reflns         3718
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.073
_refine_ls_R_factor_gt           0.043
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0339P)^2^+0.8112P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.090
_refine_ls_wR_factor_ref         0.100
_reflns_number_gt                2690
_reflns_number_total             3718
_reflns_threshold_expression     I>2\s(I)
_cod_duplicate_entry             7113857
_cod_data_source_file            b305457h.txt
_cod_data_source_block           BChen_compound_8
_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/n        '
_cod_database_code               7103871