Improved selectivity for Pb(ii) by sulfur, selenium and tellurium analogues of 1,8-anthraquinone-18-crown-5: synthesis, spectroscopy, X-ray crystallography and computational studies.
Mariappan, Kadarkaraisamy; Alaparthi, Madhubabu; Hoffman, Mariah; Rama, Myriam Alcantar; Balasubramanian, Vinothini; John, Danielle M.; Sykes, Andrew G.; Dalton transactions (Cambridge, England : 2003) 44 (2015) 11774–11787; doi:10.1039/c5dt01305d

data_7035279
_publ_section_title
;
 Improved selectivity for Pb(ii) by sulfur, selenium and tellurium
 analogues of 1,8-anthraquinone-18-crown-5: synthesis, spectroscopy, X-ray
 crystallography and computational studies.
;
_journal_issue                   26
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11774
_journal_page_last               11787
_journal_paper_doi               10.1039/c5dt01305d
_journal_volume                  44
_journal_year                    2015
_chemical_formula_moiety         'C22 H24 O5 Se'
_chemical_formula_sum            'C22 H24 O5 Se'
_chemical_formula_weight         447.37
_chemical_name_common            CE-Se
_chemical_name_systematic
;
 CE-Se
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-01-07 deposited with the CCDC.
2015-05-27 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 104.1850(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.6414(8)
_cell_length_b                   8.0187(4)
_cell_length_c                   16.9048(9)
_cell_measurement_reflns_used    9921
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.38
_cell_measurement_theta_min      2.49
_cell_volume                     1924.19(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  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  '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  0.0331
_diffrn_reflns_av_sigmaI/netI    0.0235
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            18815
_diffrn_reflns_theta_full        25.38
_diffrn_reflns_theta_max         25.38
_diffrn_reflns_theta_min         1.65
_exptl_absorpt_coefficient_mu    1.983
_exptl_absorpt_correction_T_max  0.5876
_exptl_absorpt_correction_T_min  0.3374
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.544
_exptl_crystal_density_meas      1.544
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             920
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.55
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.459
_refine_diff_density_min         -0.307
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         3538
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0297
_refine_ls_R_factor_gt           0.0237
_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^)+(0.0248P)^2^+1.3315P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0566
_refine_ls_wR_factor_ref         0.0594
_reflns_number_gt                3107
_reflns_number_total             3538
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5dt01305d3.cif
_cod_data_source_block           13066
_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/rss-feeds/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 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 7035276--7035281.cif.
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7035279