Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine
Zeng, Cheng-Hui; Wu, Haiming; Luo, Zhixun; Yao, Jiannian; CrystEngComm 20 (2018) 1123–; doi:10.1039/C7CE02098H

data_7230030
_publ_section_title
;
 Weak interactions cause selective cocrystal formation of lanthanide
 nitrates and tetra-2-pyridinylpyrazine
;
_journal_issue                   8
_journal_name_full               CrystEngComm
_journal_page_first              1123
_journal_paper_doi               10.1039/C7CE02098H
_journal_volume                  20
_journal_year                    2018
_chemical_formula_sum            'C24 H18 Eu N11 O15'
_chemical_formula_weight         852.45
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2017-09-30 deposited with the CCDC.
2018-01-25 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 96.47(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.438(2)
_cell_length_b                   19.463(4)
_cell_length_c                   13.640(3)
_cell_measurement_reflns_used    5502
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.4845
_cell_measurement_theta_min      2.0752
_cell_volume                     3017.2(11)
_computing_cell_refinement       'Bruker FRAMBO'
_computing_data_collection       'Bruker FRAMBO'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'multiwire proportional'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0436
_diffrn_reflns_av_sigmaI/netI    0.0267
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            18534
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    2.173
_exptl_absorpt_correction_T_max  0.8284
_exptl_absorpt_correction_T_min  0.5341
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.877
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1688
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.09
_refine_diff_density_max         1.303
_refine_diff_density_min         -0.693
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.007
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     232
_refine_ls_number_reflns         3438
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_all          0.0358
_refine_ls_R_factor_gt           0.0348
_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^)+(0.0627P)^2^+9.9261P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0956
_refine_ls_wR_factor_ref         0.0963
_reflns_number_gt                3384
_reflns_number_total             3438
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ce02098h2.cif
_cod_data_source_block           1-Eu
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7230030--7230033.cif.
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7230030