The 2,6-dimercaptoazulene motif: efficient synthesis and completely regioselective metallation of its 6-mercapto terminus
Scheetz, Kolbe J.; Spaeth, Andrew D.; Vorushilov, Alexander S.; Powell, Douglas R.; Day, Victor W.; Barybin, Mikhail V.; Chemical Science 4 (2013) 4267–; doi:10.1039/c3sc51773j

data_1514726
_publ_section_title
;
 The 2,6-dimercaptoazulene motif: efficient synthesis and completely
 regioselective metallation of its 6-mercapto terminus
;
_journal_issue                   11
_journal_name_full               'Chemical Science'
_journal_page_first              4267
_journal_paper_doi               10.1039/c3sc51773j
_journal_volume                  4
_journal_year                    2013
_chemical_formula_moiety         'C16 H16 O4 S'
_chemical_formula_sum            'C16 H16 O4 S'
_chemical_formula_weight         304.35
_chemical_name_common            2-mercapto-1,3-di(ethoxycarbonyl)azulene
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                109.364(2)
_cell_angle_beta                 106.530(3)
_cell_angle_gamma                98.626(2)
_cell_formula_units_Z            4
_cell_length_a                   10.8453(14)
_cell_length_b                   12.1730(15)
_cell_length_c                   12.2364(15)
_cell_measurement_reflns_used    2370
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.64
_cell_measurement_theta_min      2.76
_cell_volume                     1406.8(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_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  0.0395
_diffrn_reflns_av_sigmaI/netI    0.0587
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12191
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.76
_diffrn_standards_decay_%        0.00
_exptl_absorpt_coefficient_mu    0.243
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.912
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (2000)'
_exptl_crystal_colour            Red-orange
_exptl_crystal_density_diffrn    1.437
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Square plate'
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.17
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.655
_refine_diff_density_min         -0.313
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.960
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     391
_refine_ls_number_reflns         5491
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.960
_refine_ls_R_factor_all          0.0811
_refine_ls_R_factor_gt           0.0516
_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^)+(0.0794P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1235
_refine_ls_wR_factor_ref         0.1346
_reflns_number_gt                3772
_reflns_number_total             5491
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3sc51773j.txt
_cod_data_source_block           k94e
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/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 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1514726