Exploring the hydrogen-bond preference of N?H moieties in co-crystals assembled via O?H(acid)?N(py) intermolecular interactions
Christer B. Aakeröy; Izhar Hussain; Safiyyah Forbes; John Desper; CrystEngComm 9 (2007) 46–; doi:10.1039/b614984g

data_7202553
_publ_section_title
;
 Exploring the hydrogen-bond preference of N?H moieties in co-crystals
 assembled via O?H(acid)?N(py) intermolecular interactions
;
_journal_issue                   1
_journal_name_full               CrystEngComm
_journal_page_first              46
_journal_paper_doi               10.1039/b614984g
_journal_volume                  9
_journal_year                    2007
_chemical_formula_moiety
;
(C7 H8 N2 O)2 (C4 H4 O4)
;
_chemical_formula_sum            'C18 H20 N4 O6'
_chemical_formula_weight         388.38
_chemical_name_common            'bis(N-(3-pyridyl)acetamide) fumaric acid'
_chemical_name_systematic
;
bis[N-(3-pyridyl)acetamide] fumaric acid
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.930(4)
_cell_length_b                   3.9380(10)
_cell_length_c                   25.723(6)
_cell_measurement_reflns_used    2163
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.25
_cell_measurement_theta_min      2.40
_cell_volume                     1816.3(7)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.946
_diffrn_measured_fraction_theta_max 0.946
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0776
_diffrn_reflns_av_sigmaI/netI    0.0627
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            11419
_diffrn_reflns_theta_full        28.22
_diffrn_reflns_theta_max         28.22
_diffrn_reflns_theta_min         1.58
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.420
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.922
_refine_diff_density_min         -0.487
_refine_diff_density_rms         0.143
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.110
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         2172
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.110
_refine_ls_R_factor_all          0.1140
_refine_ls_R_factor_gt           0.0861
_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^)+(0.1350P)^2^+1.2000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2101
_refine_ls_wR_factor_ref         0.2264
_reflns_number_gt                1612
_reflns_number_total             2172
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b614984g.txt
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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_cell_volume        1816.2(8)
_cod_original_sg_symbol_H-M      Pca2(1)
_cod_database_code               7202553