Furanodendralenes.
Fallon, Thomas; Willis, Anthony C; Paddon-Row, Michael N; Sherburn, Michael S; The Journal of organic chemistry 79 (2014) 3185–3193; doi:10.1021/jo500458y

data_4029216
_publ_section_title
;
 Furanodendralenes.
;
_journal_issue                   7
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              3185
_journal_page_last               3193
_journal_paper_doi               10.1021/jo500458y
_journal_volume                  79
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_compound_source        local
_chemical_formula_moiety         'C16 H16 N2 O5'
_chemical_formula_sum            'C16 H16 N2 O5'
_chemical_formula_weight         316.31
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             10-07-28
_audit_creation_method           CRYSTALS_ver_12.87
_audit_update_record
;
2010-07-29 - Report on C16 H16 N2 O5
             by Anthony C. Willis
             for Thomas Fallon and Mick Sherburn
2010-07-29 - passes checkcif tests with minor warnings
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   10.3113(1)
_cell_length_b                   15.9233(2)
_cell_length_c                   17.7014(3)
_cell_measurement_reflns_used    29774
_cell_measurement_temperature    200
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.6
_cell_volume                     2906.39(7)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics
; 
ORTEP-II (Johnson 1976) in teXsan (MSC, 1992-1997)
;
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      200
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'Nonius KappaCCD'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       ' \f and \w scans with CCD '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.051
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            45981
_diffrn_reflns_theta_full        27.498
_diffrn_reflns_theta_max         27.498
_diffrn_reflns_theta_min         2.558
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  0.992
_exptl_absorpt_correction_T_min  0.968
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
via Gaussian method (Coppens, 1970) implemented in maXus (2000)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.446
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             1328
_exptl_crystal_size_max          0.440
_exptl_crystal_size_mid          0.140
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.23
_refine_ls_abs_structure_details
;
The space group is non-centrosymmetric but,
in the absence of significant anomalous scattering, 
the Friedel pairs have been merged
and the absolute structure has not been determined. 
The two independent molecules have opposite chirality.
;
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0123
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         3735
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0393
_refine_ls_R_factor_gt           0.0339
_refine_ls_shift/su_max          0.0003629
_refine_ls_shift/su_mean         0.00008
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.04P)^2^ + 0.65P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0801
_refine_ls_wR_factor_gt          0.0777
_refine_ls_wR_factor_ref         0.0801
_reflns_limit_h_max              13
_reflns_limit_h_min              0
_reflns_limit_k_max              20
_reflns_limit_k_min              0
_reflns_limit_l_max              22
_reflns_limit_l_min              0
_reflns_number_gt                3396
_reflns_number_total             3736
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.75
_oxford_diffrn_Wilson_scale      3.78
_oxford_refine_ls_r_factor_ref   0.0393
_oxford_refine_ls_scale          0.5230(8)
_oxford_reflns_number_all        3735
_oxford_reflns_threshold_expression_ref I>-10.0\s(I)
_oxford_structure_analysis_title '7281428 she1019'
_cod_data_source_file            jo500458y_si_002.cif
_cod_data_source_block           she1019
_cod_depositor_comments
;The following automatic conversions were performed:

'_symmetry_cell_setting'
 value 'Orthorhombic' changed to
'orthorhombic' according
 to
/usr/data/users/saulius/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary
 named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion
 script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius  Adding full
 bibliography for /tmp/tmp-cod-update-bibliographies-17276/cifs/4029216.cif.
;
_cod_original_sg_symbol_H-M      'P 21 21 21 '
_cod_database_code               4029216