Co-crystals and co-crystal hydrates of vanillic acid
Jacobs, Ayesha; Amombo Noa, Francoise M.; CrystEngComm 17 (2015) 98–; doi:10.1039/C4CE01795A

data_7218771
_publ_section_title
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 Co-crystals and co-crystal hydrates of vanillic acid
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_journal_issue                   1
_journal_name_full               CrystEngComm
_journal_page_first              98
_journal_paper_doi               10.1039/C4CE01795A
_journal_volume                  17
_journal_year                    2015
_chemical_formula_sum            'C24 H28 N8 O8'
_chemical_formula_weight         556.54
_chemical_name_systematic
; 
 vanillic acid (bis) caffeine co-crystal 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                77.69(3)
_cell_angle_beta                 81.26(3)
_cell_angle_gamma                82.69(3)
_cell_formula_units_Z            2
_cell_length_a                   10.110(2)
_cell_length_b                   10.525(2)
_cell_length_c                   12.221(2)
_cell_measurement_reflns_used    12163
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.34
_cell_measurement_theta_min      1.72
_cell_volume                     1249.7(4)
_computing_cell_refinement       'SAINT-Plus (Bruker, 2004)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'SAINT-Plus and XPREP (Bruker 2004)'
_computing_molecular_graphics    'X-seed (Barbour, 1999)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker Kappa Duo Apex II diffractometer'
_diffrn_measurement_method       '1.2\% \f scans and \w 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  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0415
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            12163
_diffrn_reflns_theta_full        28.34
_diffrn_reflns_theta_max         28.34
_diffrn_reflns_theta_min         1.72
_exptl_absorpt_coefficient_mu    0.114
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.851
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.479
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangle
_exptl_crystal_F_000             584
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: ethyl methylketone'
_exptl_crystal_size_max          0.51
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.885
_refine_diff_density_min         -0.264
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     370
_refine_ls_number_reflns         6186
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0782
_refine_ls_R_factor_gt           0.0542
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0803P)^2^+0.6205P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1448
_refine_ls_wR_factor_ref         0.1605
_reflns_number_gt                4486
_reflns_number_total             6186
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ce01795a2.cif
_cod_data_source_block           a:
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/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 2827 2014-09-09 07:05:25Z andrius 

 Adding full bibliography for 7218771--7218777.cif.
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_cod_database_code               7218771