Dinuclear p-Cymene Ruthenium Hydrido Complexes as Active Catalysts for the Hydrogenation of Levulinic Acid to γ-Valerolactone with Formic Acid as the Hydrogen Source
Tay, Boon Ying; Wang, Cun; Tan, Davin; Dighe, Shashikant U.; Stubbs, Ludger P.; Gholap, Sandeep Suryabhan; Huynh, Han Vinh; Dalton Transactions  (2026) –; doi:10.1039/D5DT02040A

data_7719999
_publ_section_title
;
 Dinuclear p-Cymene Ruthenium Hydrido Complexes as Active Catalysts for
 the Hydrogenation of Levulinic Acid to \g-Valerolactone with Formic Acid
 as the Hydrogen Source
;
_journal_name_full               'Dalton Transactions'
_journal_paper_doi               10.1039/D5DT02040A
_journal_year                    2026
_chemical_formula_sum            'C20 H29 Br3 Ru2'
_chemical_formula_weight         711.30
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'by CrystalClear-SM 1.4.0 ra1'
_audit_update_record
;
2024-03-02 deposited with the CCDC.	2025-12-08 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.961(3)
_cell_length_b                   16.166(3)
_cell_length_c                   19.464(4)
_cell_measurement_reflns_used    14891
_cell_measurement_temperature    110.1500
_cell_measurement_theta_max      31.1261
_cell_measurement_theta_min      1.9274
_cell_volume                     4392.9(15)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      110.1500
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Saturn70 (2x2 bin mode)'
_diffrn_measurement_method       dtprofit.ref
_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  0.0323
_diffrn_reflns_av_sigmaI/netI    0.0367
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            17450
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    6.834
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9225
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            'Dark red'
_exptl_crystal_density_diffrn    2.151
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2736
_exptl_crystal_size_max          0.2500
_exptl_crystal_size_mid          0.2200
_exptl_crystal_size_min          0.1100
_refine_diff_density_max         1.321
_refine_diff_density_min         -0.920
_refine_diff_density_rms         0.154
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.104
_refine_ls_hydrogen_treatment
;all Hydrogen atoms except H21 have been refined in
 the riding mode on their carrier atom. H21 was defined from the difference map.
;
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         5389
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.104
_refine_ls_R_factor_all          0.0420
_refine_ls_R_factor_gt           0.0373
_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^)+(0.0300P)^2^+11.8868P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0780
_refine_ls_wR_factor_ref         0.0805
_reflns_number_gt                4916
_reflns_number_total             5389
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d5dt02040a2.cif
_cod_data_source_block           shelxs
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 8170 2020-07-09 18:12:32Z antanas 
;
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               7719999