Magnetically separable Fe3O4-SO3H nanoparticles as an efficient solid acid support for the facile synthesis of two types of spiroindole fused dihydropyridine derivatives under solvent free conditions
Pramanik, Animesh; Debnath, Kamalesh; Singha, Krishnadipti; RSC Adv.  (2015) –; doi:10.1039/C5RA00737B

data_7220230
_publ_section_title
;
 Magnetically separable Fe3O4-SO3H nanoparticles as an efficient solid
 acid support for the facile synthesis of two types of spiroindole fused
 dihydropyridine derivatives under solvent free conditions
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C5RA00737B
_journal_year                    2015
_chemical_formula_sum            'C29 H28 N2 O3'
_chemical_formula_weight         452.20
_chemical_name_systematic
;
 ?
;
_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_block_doi                 10.5517/cc13zvc9
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-01-08 deposited with the CCDC.
2015-03-26 downloaded from the CCDC.
;
_cell_angle_alpha                81.845(9)
_cell_angle_beta                 82.064(8)
_cell_angle_gamma                81.901(8)
_cell_formula_units_Z            6
_cell_length_a                   15.762(10)
_cell_length_b                   15.776(10)
_cell_length_c                   15.783(10)
_cell_measurement_temperature    296(2)
_cell_volume                     3818(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.890
_diffrn_measured_fraction_theta_max 0.890
_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  0.0861
_diffrn_reflns_av_sigmaI/netI    0.2377
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            17313
_diffrn_reflns_theta_full        24.84
_diffrn_reflns_theta_max         24.84
_diffrn_reflns_theta_min         1.31
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9989
_exptl_absorpt_correction_T_min  0.9978
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.180
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1438
_exptl_crystal_size_max          0.04
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.739
_refine_diff_density_min         -0.392
_refine_diff_density_rms         0.140
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     935
_refine_ls_number_reflns         11796
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.3149
_refine_ls_R_factor_gt           0.1516
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3795
_refine_ls_wR_factor_ref         0.4589
_reflns_number_gt                3579
_reflns_number_total             11796
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ra00737b2.cif
_cod_data_source_block           329
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7220230