Experimental and Theoretical Study of Aromaticity Effects in the Solid State Architecture on Squaric Acid Derivatives
Prohens, Rafel; Portell, Anna; Font-Bardia, Mercè; Bauzá, Antonio; Frontera, Antonio; Crystal Growth & Design 14 (2014) 2578–; doi:10.1021/cg500264k

data_4510469
_publ_section_title
;
 Experimental and Theoretical Study of Aromaticity Effects in the Solid
 State Architecture on Squaric Acid Derivatives
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              2578
_journal_paper_doi               10.1021/cg500264k
_journal_volume                  14
_journal_year                    2014
_chemical_formula_moiety         'C12 H13 N O5'
_chemical_formula_sum            'C12 H13 N O5'
_chemical_formula_weight         251.23
_space_group_crystal_system      orthorhombic
_space_group_IT_number           18
_space_group_name_Hall           'P 2bc 2'
_space_group_name_H-M_alt        'P 2 21 21'
_symmetry_space_group_name_Hall  'P 2bc 2'
_symmetry_space_group_name_H-M   'P 2 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2012
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.019(4)
_cell_length_b                   7.217(3)
_cell_length_c                   26.878(13)
_cell_measurement_reflns_used    2536
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      31
_cell_measurement_theta_min      3
_cell_volume                     1167.6(11)
_computing_cell_refinement       'AUTOMAR (Claudio Klein, 2007)'
_computing_data_collection       'MARXDS (Claudio Klein, 2005)'
_computing_data_reduction        'MARSCALE (Claudio Klein, 2007)'
_computing_molecular_graphics    'ORTEP (Brueggermann and Smith, 1990)'
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-2012 (Sheldrick, 2012)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 'image plate'
_diffrn_measured_fraction_theta_full 0.857
_diffrn_measured_fraction_theta_max 0.680
_diffrn_measurement_device_type  'MAR345 with image plate detector'
_diffrn_measurement_method       'phi scan'
_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  0.0317
_diffrn_reflns_av_unetI/netI     0.0202
_diffrn_reflns_Laue_measured_fraction_full 0.857
_diffrn_reflns_Laue_measured_fraction_max 0.680
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            7052
_diffrn_reflns_point_group_measured_fraction_full 0.836
_diffrn_reflns_point_group_measured_fraction_max 0.649
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         30.434
_diffrn_reflns_theta_min         2.922
_exptl_absorpt_coefficient_mu    0.112
_exptl_crystal_colour            colourles
_exptl_crystal_density_diffrn    1.429
_exptl_crystal_description       prism
_exptl_crystal_F_000             528
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.327
_refine_diff_density_min         -0.231
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         2312
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0508
_refine_ls_R_factor_gt           0.0487
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(Fo^2^)+(0.0436P)^2^+0.5670P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1131
_refine_ls_wR_factor_ref         0.1154
_reflns_Friedel_coverage         0.625
_reflns_Friedel_fraction_full    0.804
_reflns_Friedel_fraction_max     0.604
_reflns_number_gt                2229
_reflns_number_total             2312
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cg500264k_si_011.cif
_cod_data_source_block           anpm130_compound_4
_cod_depositor_comments
'Adding full bibliography for 4510466--4510471.cif.'
_cod_database_code               4510469
_shelxl_version_number           2012-9
_shelx_res_checksum              35111
_shelx_hkl_checksum              57994