Origin of SMM behaviour in an asymmetric Er(III) Schiff base complex: a combined experimental and theoretical study
Das, Chinmoy; Upadhyay, Apoorva; Vaidya, Shefali; Singh, Saurabh Kumar; Rajaraman, Gopalan; Shanmugam, Maheswaran; Chemical Communications (Cambridge, United Kingdom) 51 (2015) 6137–6140; doi:10.1039/c4cc09523e

data_7116868
_publ_section_title
;
 Origin of SMM behaviour in an asymmetric Er(III) Schiff base complex:
 a combined experimental and theoretical study
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   28
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              6137
_journal_page_last               6140
_journal_paper_doi               10.1039/c4cc09523e
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C28 H26 Er N5 O13'
_chemical_formula_weight         807.80
_space_group_IT_number           41
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'A 2 -2ab'
_symmetry_space_group_name_H-M   'A b a 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-11-28 deposited with the CCDC.
2015-02-14 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            12
_cell_length_a                   17.572(5)
_cell_length_b                   54.043(16)
_cell_length_c                   9.580(3)
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.15
_cell_measurement_theta_min      3.02
_cell_volume                     9098(5)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.1 b24 (Rigaku, 2012)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.1 b24 (Rigaku, 2012)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.1 b24 (Rigaku, 2012)
;
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type
;
Rigaku Saturn724+ (4x4 bin mode)
;
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0812
_diffrn_reflns_av_sigmaI/netI    0.0684
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       74
_diffrn_reflns_limit_k_min       -74
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            59128
_diffrn_reflns_theta_full        29.15
_diffrn_reflns_theta_max         29.15
_diffrn_reflns_theta_min         3.02
_exptl_absorpt_coefficient_mu    2.844
_exptl_absorpt_correction_T_max  0.6001
_exptl_absorpt_correction_T_min  0.6001
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Numerical Absorption'
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    1.769
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             4812
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         4.275
_refine_diff_density_min         -2.284
_refine_diff_density_rms         0.234
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.135
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     548
_refine_ls_number_reflns         11965
_refine_ls_number_restraints     377
_refine_ls_restrained_S_all      1.155
_refine_ls_R_factor_all          0.0940
_refine_ls_R_factor_gt           0.0830
_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^)+(0.0708P)^2^+166.4591P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1851
_refine_ls_wR_factor_ref         0.1964
_reflns_number_gt                10593
_reflns_number_total             11965
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc09523e2.cif
_cod_data_source_block           erlav
_cod_original_sg_symbol_H-M      Aba2
_cod_database_code               7116868