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_7052667
_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         'C16 H34 O2, 2(C H4 N2 O)'
_chemical_formula_sum            'C18 H42 N4 O4'
_chemical_formula_weight         378.56
_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                103.295(4)
_cell_angle_beta                 92.698(3)
_cell_angle_gamma                101.711(5)
_cell_formula_units_Z            1
_cell_length_a                   5.1973(5)
_cell_length_b                   7.3964(12)
_cell_length_c                   15.0141(16)
_cell_measurement_reflns_used    1615
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.30
_cell_measurement_theta_min      2.90
_cell_volume                     547.33(12)
_computing_cell_refinement       'MSC Software'
_computing_data_collection       'MSC Software'
_computing_data_reduction        'MSC Software'
_computing_structure_refinement  SHELXL97
_computing_structure_solution    SHELXS86
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.96
_diffrn_measured_fraction_theta_max 0.96
_diffrn_measurement_device_type  'Rigaku R-axis IIc Image plate'
_diffrn_measurement_method       'Image plate slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0413
_diffrn_reflns_av_sigmaI/netI    0.0383
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            3090
_diffrn_reflns_theta_full        24.3
_diffrn_reflns_theta_max         24.30
_diffrn_reflns_theta_min         2.90
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.148
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             210
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.210
_refine_diff_density_rms         0.030
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           fullcycle
_refine_ls_number_parameters     119
_refine_ls_number_reflns         1707
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0556
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1860P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1649
_refine_ls_wR_factor_ref         0.1650
_reflns_number_gt                1615
_reflns_number_total             1707
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1nj20040b.txt
_cod_data_source_block           diol16h
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_sg_symbol_H-M      P-1
_cod_database_code               7052667