Single molecule magnet behavior and magnetic refrigeration of carbonyl oxygen-bridged tetranuclear lanthanide complexes
Yang, Chen; Wei, Yu-Heng; Xu, Shuang; Zhang, Hao-Yu; Yang, Yue-Qi; Zhang, Bo; Fang, Ming; New Journal of Chemistry 45 (2021) 14103–14110; doi:10.1039/D1NJ01833G

data_7060795
_publ_section_title
;
 Single molecule magnet behavior and magnetic refrigeration of carbonyl
 oxygen-bridged tetranuclear lanthanide complexes
;
_journal_issue                   31
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              14103
_journal_page_last               14110
_journal_paper_doi               10.1039/D1NJ01833G
_journal_volume                  45
_journal_year                    2021
_chemical_formula_moiety         'C64 H64 Dy4 N12 O16, 4(C H4 O)'
_chemical_formula_sum            'C68 H80 Dy4 N12 O20'
_chemical_formula_weight         2035.44
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_audit_creation_date             2017-12-06
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-08-18 deposited with the CCDC.	2021-06-04 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 105.2013(11)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   28.7105(8)
_cell_length_b                   8.3984(3)
_cell_length_c                   30.9075(12)
_cell_measurement_reflns_used    9880
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.34
_cell_measurement_theta_min      2.53
_cell_volume                     7191.7(4)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution
;
Superflip (Palatinus & Chapuis, 2007;Palatinus & van der Lee, 2008;
Palatinus et al., 2012)
;
_diffrn_ambient_temperature      173.01
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0746
_diffrn_reflns_av_unetI/netI     0.0353
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            55145
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.010
_diffrn_reflns_theta_max         25.010
_diffrn_reflns_theta_min         2.534
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.189
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6026
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.0875 before and 0.0639 after correction.
The Ratio of minimum to maximum transmission is 0.8086.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.880
_exptl_crystal_description       block
_exptl_crystal_F_000             3984
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.11
_refine_diff_density_max         1.887
_refine_diff_density_min         -0.936
_refine_diff_density_rms         0.134
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     477
_refine_ls_number_reflns         6321
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.082
_refine_ls_R_factor_all          0.0444
_refine_ls_R_factor_gt           0.0295
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0280P)^2^+30.5520P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0607
_refine_ls_wR_factor_ref         0.0671
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5234
_reflns_number_total             6321
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1nj01833g2.cif
_cod_data_source_block           mo_1201_12_0m
_cod_depositor_comments
'Adding full bibliography for 7060795--7060797.cif.'
_cod_database_code               7060795
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.656
_shelx_estimated_absorpt_t_min   0.409
_exptl_absorpt_special_details   block
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2. Uiso/Uaniso restraints and constraints
Uanis(C33) \\sim Ueq: with sigma of 0.01 and sigma for terminal atoms of 0.02
3.a Secondary CH2 refined with riding coordinates:
 C1(H1A,H1B), C16(H16A,H16B)
3.b Aromatic/amide H refined with riding coordinates:
 N5(H5), C28(H28), C8(H8), C10(H10), C27(H27), C25(H25), N2(H2), C20(H20),
 C3(H3), C23(H23), C12(H12), C19(H19), C18(H18), C13(H13), C5(H5A), C4(H4)
3.c Idealised Me refined as rotating group:
 C31(H31A,H31B,H31C), C15(H15A,H15B,H15C), C30(H30A,H30B,H30C), C33(H33A,H33B,
 H33C), C32(H32A,H32B,H32C), C34(H34A,H34B,H34C)
3.d Idealised tetrahedral OH refined as rotating group:
 O10(H10A), O9(H9)
;
_shelx_res_checksum              66620
_olex2_submission_special_instructions 'No special instructions were received'