Crystal structure of (7Z)-7-(2-azidoethylidene)-2,3- dihydrofuro[3,4-b] [1,4]dioxin-5(7H)-one, C8H7N3O4
Andreas Ries; Jürgen Sander; Christian Neis; Anton Zaschka; Bernd Morgenstern; Kaspar Hegetschweiler; Zeitschrift für Kristallographie - New Crystal Structures 223 (2008) 377–; doi:

data_8102322
_publ_section_title
;
 Crystal structure of (7Z)-7-(2-azidoethylidene)-2,3-
 dihydrofuro[3,4-b] [1,4]dioxin-5(7H)-one, C8H7N3O4
;
_journal_issue                   4
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              377
_journal_volume                  223
_journal_year                    2008
_chemical_formula_sum            'C8 H7 N3 O4'
_chemical_formula_weight         209.17
_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                   18.654(2)
_cell_length_b                   3.8526(5)
_cell_length_c                   12.0746(14)
_cell_measurement_reflns_used    4260
_cell_measurement_temperature    153(2)
_cell_volume                     867.76(18)
_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      153(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker X8 Apex, Nonius Kappa CCD'
_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  0.0361
_diffrn_reflns_av_sigmaI/netI    0.0226
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            11379
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         2.18
_exptl_absorpt_coefficient_mu    0.131
_exptl_absorpt_correction_T_max  0.9808
_exptl_absorpt_correction_T_min  0.9045
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.601
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             432
_exptl_crystal_size_max          0.78
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.150
_refine_diff_density_min         -0.153
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         1838
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0299
_refine_ls_R_factor_gt           0.0258
_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^)+(0.0378P)^2^+0.0567P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0608
_refine_ls_wR_factor_ref         0.0627
_reflns_number_gt                1702
_reflns_number_total             1838
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1267-2355.cff
_cod_data_source_block           sh2804
_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 1555 2011-01-17 13:19:09Z saulius 

The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 
;
_cod_original_cell_volume        867.74(19)
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               8102322