Conversions between dimeric and polymeric ketopiperazinediacetato complexes constructed by water-layers
Yang, Yu-Chen; Jiang, Xue; Zhou, Zhao-Hui; CrystEngComm 15 (2013) 7999–; doi:10.1039/c3ce26999j

data_7210721
_publ_section_title
;
 Conversions between dimeric and polymeric ketopiperazinediacetato
 complexes constructed by water-layers
;
_journal_issue                   39
_journal_name_full               CrystEngComm
_journal_page_first              7999
_journal_paper_doi               10.1039/c3ce26999j
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C16 H40 N4 O20 Zn2'
_chemical_formula_weight         739.26
_chemical_name_common
'Tetrahydrated diketopiperazinediacetato dizinc hexahydrates'
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 105.169(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.7930(7)
_cell_length_b                   17.4391(11)
_cell_length_c                   8.6138(6)
_cell_measurement_temperature    293(2)
_cell_volume                     1419.82(17)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Oxford Gemini Diffractometer'
_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  0.0781
_diffrn_reflns_av_sigmaI/netI    0.1219
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            8169
_diffrn_reflns_theta_full        28.49
_diffrn_reflns_theta_max         28.49
_diffrn_reflns_theta_min         2.71
_exptl_absorpt_coefficient_mu    1.783
_exptl_absorpt_correction_T_max  0.8418
_exptl_absorpt_correction_T_min  0.7169
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.729
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.564
_refine_diff_density_min         -0.725
_refine_diff_density_rms         0.135
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.885
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         3583
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      0.883
_refine_ls_R_factor_all          0.0961
_refine_ls_R_factor_gt           0.0557
_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^)+(0.0745P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1196
_refine_ls_wR_factor_ref         0.1539
_reflns_number_gt                2388
_reflns_number_total             3583
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce26999j.txt
_cod_data_source_block           p2
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7210721