Structural diversity, but no polymorphism, in a homologous family of co-crystals of urea and α,ω-dihydroxyalkanes
Martí-Rujas, Javier; Kariuki, Benson M.; Hughes, Colan E.; Morte-Ródenas, Anabel; Guo, Fang; Glavcheva-Laleva, Zornitza; Taştemür, Kemal; Ooi, Li-ling; Yeo, Lily; Harris, Kenneth D. M.; New Journal of Chemistry 35 (2011) 1515–; doi:10.1039/c1nj20040b

data_7052663
_publ_section_title
;
 Structural diversity, but no polymorphism, in a homologous family of
 co-crystals of urea and \a,\w-dihydroxyalkanes
;
_journal_issue                   7
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1515
_journal_paper_doi               10.1039/c1nj20040b
_journal_volume                  35
_journal_year                    2011
_chemical_formula_moiety         'C8 H18 O2, 2(C H4 N2 O)'
_chemical_formula_sum            'C10 H26 N4 O4'
_chemical_formula_weight         266.35
_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                 112.627(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.6090(5)
_cell_length_b                   5.2000(3)
_cell_length_c                   14.3020(7)
_cell_measurement_reflns_used    1080
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      27.35
_cell_measurement_theta_min      4.12
_cell_volume                     728.27(7)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997'
_computing_molecular_graphics    'Ortep-99 for Windows (Farrugia, 1995)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1995)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'Sir-92 (A. Altomare et al., 1992)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       CCD
_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  0.0881
_diffrn_reflns_av_sigmaI/netI    0.0646
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            6704
_diffrn_reflns_theta_full        27.35
_diffrn_reflns_theta_max         27.35
_diffrn_reflns_theta_min         4.12
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9907
_exptl_absorpt_correction_T_min  0.9771
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   Denzo/Scalepack
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.215
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             292
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.191
_refine_diff_density_min         -0.214
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     83
_refine_ls_number_reflns         1641
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0985
_refine_ls_R_factor_gt           0.0612
_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^)+(0.0732P)^2^+0.1058P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1428
_refine_ls_wR_factor_ref         0.1620
_reflns_number_gt                1080
_reflns_number_total             1641
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1nj20040b.txt
_cod_data_source_block           kdm0703
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        728.27(6)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7052663