Chromene "lock", thiol "key", and mercury(II) ion "hand": a single molecular machine recognition system.
Huo, Fang-Jun; Sun, Yuan-Qiang; Su, Jing; Yang, Yu-Tao; Yin, Cai-Xia; Chao, Jian-Bin; Organic letters 12 (2010) 4756–4759; doi:10.1021/ol101771j

data_1503203
_publ_section_title
;
 Chromene &quot;lock&quot;, thiol &quot;key&quot;, and mercury(II) ion
 &quot;hand&quot;: a single molecular machine recognition system.
;
_journal_issue                   21
_journal_name_full               'Organic letters'
_journal_page_first              4756
_journal_page_last               4759
_journal_paper_doi               10.1021/ol101771j
_journal_volume                  12
_journal_year                    2010
_chemical_formula_sum            'C12 H9 Cl O2'
_chemical_formula_weight         220.64
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   15.103(3)
_cell_length_b                   6.0078(12)
_cell_length_c                   21.747(4)
_cell_measurement_temperature    571(2)
_cell_volume                     1973.2(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      571(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_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  0.0411
_diffrn_reflns_av_sigmaI/netI    0.0373
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            7515
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    0.359
_exptl_absorpt_correction_T_max  0.9649
_exptl_absorpt_correction_T_min  0.9649
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_density_diffrn    1.485
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.394
_refine_diff_density_min         -0.249
_refine_diff_density_rms         0.062
_refine_ls_extinction_coef       0.0127(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         1766
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0494
_refine_ls_R_factor_gt           0.0442
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0353P)^2^+1.7818P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1012
_refine_ls_wR_factor_ref         0.1037
_reflns_number_gt                1575
_reflns_number_total             1766
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol101771j_si_002.cif
_cod_data_source_block           hfj2
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1973.3(7)
_cod_database_code               1503203