Synthesis and Stacked Conformations of Symmetrical and Unsymmetrical Oligo-ureas of Metaphenylenediamine
Jonathan Clayden; Loïc Lemiègre; Madeleine Helliwell; Journal of Organic Chemistry 72 (2007) 2302–2308; doi:10.1021/jo061989w

data_4022645
_publ_contact_author_address
; 
Department of Chemistry 
University of Manchester 
Manchester M13 9PL 
England  UK 
;
_publ_contact_author_email       jrtest@spec.ch.man.ac.uk
_publ_contact_author_fax         44(161)275-4734
_publ_contact_author_name        'Raftery, James'
_publ_contact_author_phone       44(161)275-4700
_publ_section_title
;
 Synthesis and Stacked Conformations of Symmetrical and Unsymmetrical
 Oligo-ureas of Metaphenylenediamine
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2302
_journal_page_last               2308
_journal_paper_doi               10.1021/jo061989w
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C30 H38 N4 O2'
_chemical_formula_weight         486.64
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n 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                   17.549(2)
_cell_length_b                   6.9388(9)
_cell_length_c                   21.924(3)
_cell_measurement_reflns_used    input
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      17.665
_cell_measurement_theta_min      2.974
_cell_volume                     2669.7(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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 0.969
_diffrn_measured_fraction_theta_max 0.969
_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  0.1412
_diffrn_reflns_av_sigmaI/netI    0.3493
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            16031
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9962
_exptl_absorpt_correction_T_min  0.9848
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.211
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.233
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -2(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.602
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     333
_refine_ls_number_reflns         6207
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.602
_refine_ls_R_factor_all          0.1902
_refine_ls_R_factor_gt           0.0507
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0648
_refine_ls_wR_factor_ref         0.0939
_reflns_number_gt                1806
_reflns_number_total             6207
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo061989wsi20060927_091050.cif
_cod_data_source_block           s2140r
_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 
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_cod_database_code               4022645