Supramolecular assembly in a Janus-type urea system
Gareth O. Lloyd; Jonathan W. Steed; Chem.Commun. 50 (2014) 1426–; doi:10.1039/c3cc48603f

data_7111843
_publ_section_title
;
 Supramolecular assembly in a Janus-type urea system
;
_journal_coden_Cambridge         182
_journal_name_full               Chem.Commun.
_journal_page_first              1426
_journal_paper_doi               10.1039/c3cc48603f
_journal_volume                  50
_journal_year                    2014
_chemical_formula_moiety         'C20 H21 N5 O2'
_chemical_formula_sum            'C20 H21 N5 O2'
_chemical_formula_weight         363.42
_chemical_name_systematic
; 
 ? 
;
_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                91.1250(10)
_cell_angle_beta                 98.7050(10)
_cell_angle_gamma                97.0080(10)
_cell_formula_units_Z            2
_cell_length_a                   5.8615(2)
_cell_length_b                   11.0671(4)
_cell_length_c                   14.0882(5)
_cell_measurement_temperature    120(2)
_cell_volume                     895.95(5)
_computing_cell_refinement       'Saint - Bruker'
_computing_data_collection       'Smart - Bruker'
_computing_data_reduction        'Saint - Bruker'
_computing_molecular_graphics    Xseed
_computing_publication_material  Xseed
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Smart 6K'
_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  0.0371
_diffrn_reflns_av_sigmaI/netI    0.0443
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            16676
_diffrn_reflns_theta_full        30.52
_diffrn_reflns_theta_max         30.52
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9946
_exptl_absorpt_correction_T_min  0.9724
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.347
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             384
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.462
_refine_diff_density_min         -0.295
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         5478
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0777
_refine_ls_R_factor_gt           0.0511
_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^)+(0.0836P)^2^+0.1955P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1364
_refine_ls_wR_factor_ref         0.1549
_reflns_number_gt                3835
_reflns_number_total             5478
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc48603f.txt
_cod_data_source_block           c:\users\gol\desktop\steed\compou~1\311ai
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7111843