[2 + 2] Cycloaddition reaction of cycloheptatriene with dichloroketene. A novel and efficient synthetic strategy for the synthesis of 2-hydroxyazulene
Yokoyama, Ryuji; Ito, Shunji; Watanabe, Masataka; Harada, Nobuyuki; Kabuto, Chizuko; Morita, Noboru; Journal of the Chemical Society, Perkin Transactions 1  (2001) 2257–; doi:10.1039/b104164a

data_7216874
_publ_section_title
;
 [2 + 2] Cycloaddition reaction of cycloheptatriene with dichloroketene. A
 novel and efficient synthetic strategy for the synthesis of
 2-hydroxyazulene
;
_journal_issue                   18
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              2257
_journal_paper_doi               10.1039/b104164a
_journal_year                    2001
_chemical_formula_sum            'C11 H9 Cl3 O2'
_chemical_formula_weight         279.55
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_cell_angle_alpha                90
_cell_angle_beta                 115.7591(4)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   9.751(1)
_cell_length_b                   18.486(1)
_cell_length_c                   14.7287(6)
_cell_measurement_reflns_used    5113
_cell_measurement_temperature    293.2
_cell_measurement_theta_max      27.5
_cell_volume                     2391.1(3)
_computing_data_reduction        'teXsan Ver. 1.10'
_computing_publication_material  'teXsan Ver. 1.10'
_computing_structure_refinement  'teXsan Ver. 1.10'
_computing_structure_solution    SIR92
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.9306
_diffrn_measured_fraction_theta_max 0.9306
_diffrn_measurement_device_type  'Rigaku/MSC CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.028
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            20686
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_exptl_absorpt_coefficient_mu    0.745
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.812
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Jacobson, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.553
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.21
_refine_diff_density_min         -0.22
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.938
_refine_ls_hydrogen_treatment    noref
_refine_ls_number_parameters     289
_refine_ls_number_reflns         2442
_refine_ls_R_factor_gt           0.0408
_refine_ls_shift/su_max          0.0002
_refine_ls_structure_factor_coef F
_refine_ls_weighting_scheme      unit
_refine_ls_wR_factor_ref         0.0421
_reflns_number_gt                2442
_reflns_number_total             5096
_reflns_threshold_expression     F^2^>3.0\s(F^2^)
_cod_data_source_file            b104164a.txt
_cod_data_source_block           ito004d-283k
_cod_original_formula_sum        'C11 H9 Cl3 O2 '
_cod_database_code               7216874