Synthesis and Diels-Alder Reactivity of Substituted [4]Dendralenes.
Saglam, Mehmet F.; Alborzi, Ali R.; Payne, Alan D.; Willis, Anthony C.; Paddon-Row, Michael N; Sherburn, Michael S.; The Journal of organic chemistry 81 (2016) 1461–1475; doi:10.1021/acs.joc.5b02583

data_4031878
_publ_section_title
;
 Synthesis and Diels-Alder Reactivity of Substituted [4]Dendralenes.
;
_journal_issue                   4
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              1461
_journal_page_last               1475
_journal_paper_doi               10.1021/acs.joc.5b02583
_journal_volume                  81
_journal_year                    2016
_chemical_absolute_configuration unk
_chemical_compound_source        local
_chemical_formula_moiety         'C19 H22 N2 O4'
_chemical_formula_sum            'C19 H22 N2 O4'
_chemical_formula_weight         342.39
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             12-02-09
_audit_creation_method           CRYSTALS_ver_14.11
_audit_update_record
;
2012-02-09 - Report on C19 H22 N2 O4
             by Anthony C. Willis
             for Mehmet Saglam and Mick Sherburn
2012-02-09 - passes checkcif tests with minor warnings
2015-08-26 - CCDC version
;
_cell_angle_alpha                90
_cell_angle_beta                 104.4285(19)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.7713(4)
_cell_length_b                   8.2519(3)
_cell_length_c                   12.8289(5)
_cell_measurement_reflns_used    32354
_cell_measurement_temperature    200
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.6
_cell_volume                     899.27(6)
_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       Area
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.041
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20374
_diffrn_reflns_theta_full        27.484
_diffrn_reflns_theta_max         27.484
_diffrn_reflns_theta_min         3.225
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.994
_exptl_absorpt_correction_T_min  0.980
_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    1.264
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             364
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.140
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.18
_refine_diff_density_min         -0.15
_refine_ls_extinction_coef       210(30)
_refine_ls_extinction_method     'Larson (1970), Equation 22'
_refine_ls_goodness_of_fit_ref   1.0081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         2208
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0380
_refine_ls_R_factor_gt           0.0346
_refine_ls_shift/su_max          0.0008784
_refine_ls_shift/su_mean         0.0001502
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.05P)^2^ + 0.17P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0860
_refine_ls_wR_factor_gt          0.0839
_refine_ls_wR_factor_ref         0.0860
_reflns_limit_h_max              11
_reflns_limit_h_min              -11
_reflns_limit_k_max              10
_reflns_limit_k_min              0
_reflns_limit_l_max              16
_reflns_limit_l_min              0
_reflns_number_gt                2033
_reflns_number_total             2208
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.98
_oxford_diffrn_Wilson_scale      0.53
_oxford_refine_ls_r_factor_ref   0.0380
_oxford_refine_ls_scale          1.441(10)
_oxford_reflns_number_all        2208
_oxford_reflns_threshold_expression_ref I>-10.0\s(I)
_oxford_structure_analysis_title '2091148 she1201'
_cod_data_source_file            jo5b02583_si_001.cif
_cod_data_source_block           compound_45
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/current/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 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_sg_symbol_Hall     ' p 2yb '
_cod_original_sg_symbol_H-M      'P 1 21 1 '
_cod_database_code               4031878
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
CONT EXTPARAM 
RIDE C   (   4,X'S) H   (  41,X'S) 
RIDE C   (   5,X'S) H   (  51,X'S) H   (  52,X'S) 
RIDE C   (   8,X'S) H   (  81,X'S) H   (  82,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) 
RIDE C   (  14,X'S) H   ( 141,X'S) H   ( 142,X'S) 
RIDE C   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  16,X'S) H   ( 161,X'S) 
RIDE C   (  18,X'S) H   ( 181,X'S) H   ( 182,X'S) 
RIDE C   (  19,X'S) H   ( 191,X'S) H   ( 192,X'S) H   ( 193,X'S) 
RIDE C   (  20,X'S) H   ( 201,X'S) H   ( 202,X'S) H   ( 203,X'S) 
RIDE C   (  21,X'S) H   ( 211,X'S) H   ( 212,X'S) H   ( 213,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;