New Set of Multicomponent Crystals as Efficient Heterogeneous Catalysts for the Synthesis of Cyclic Carbonates.
Kundu, Arunangshu; Saikia, Swagata; Majumder, Manoj; Sengupta, Oindrila; Bhattacharya, Biswajit; De, Gobinda Chandra; Ghosh, Sushobhan; ACS omega 4 (2019) 5221–5232; doi:10.1021/acsomega.9b00101

data_4516962
_publ_section_title
;
 New Set of Multicomponent Crystals as Efficient Heterogeneous Catalysts
 for the Synthesis of Cyclic Carbonates.
;
_journal_issue                   3
_journal_name_full               'ACS omega'
_journal_page_first              5221
_journal_page_last               5232
_journal_paper_doi               10.1021/acsomega.9b00101
_journal_volume                  4
_journal_year                    2019
_chemical_formula_sum            'C10 H10 O4'
_chemical_formula_weight         194.18
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2017/1
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.7048(11)
_cell_length_b                   5.6391(4)
_cell_length_c                   21.9019(16)
_cell_measurement_reflns_used    5811
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      24.82
_cell_measurement_theta_min      2.92
_cell_volume                     1816.1(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics
'ORTEP3 (Farrugia, 1997) and Mercury (Bruno et al., 2002)'
_computing_publication_material  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker Apex2 CCD diffractometer'
_diffrn_measurement_method       '\w and \f scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0691
_diffrn_reflns_av_unetI/netI     0.0611
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            27935
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.999
_diffrn_reflns_theta_min         1.860
_diffrn_source                   'Sealed tube'
_exptl_absorpt_coefficient_mu    0.111
_exptl_absorpt_correction_T_max  0.91
_exptl_absorpt_correction_T_min  0.89
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 1999)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.420
_exptl_crystal_description       block
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.301
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.079
_refine_ls_abs_structure_details
;
 Flack x determined using 1253 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.0(10)
_refine_ls_extinction_coef       0.021(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2017/1 (Sheldrick 2017)'
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     507
_refine_ls_number_reflns         3961
_refine_ls_number_restraints     1141
_refine_ls_restrained_S_all      0.967
_refine_ls_R_factor_all          0.0748
_refine_ls_R_factor_gt           0.0574
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1080P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1499
_refine_ls_wR_factor_ref         0.1683
_reflns_Friedel_coverage         0.946
_reflns_Friedel_fraction_full    0.996
_reflns_Friedel_fraction_max     0.996
_reflns_number_gt                3093
_reflns_number_total             3961
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ao9b00101_si_004.cif
_cod_data_source_block           NEW
_cod_database_code               4516962
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.968
_shelx_estimated_absorpt_t_max   0.978
_shelx_res_checksum              21282
_shelx_hkl_checksum              58490