A fullerene-carbene adduct as a crystalline molecular rotor: remarkable behavior of a spherically-shaped rotator.
Lorbach, Andreas; Maverick, Emily; Carreras, Abel; Alemany, Pere; Wu, Guang; Garcia-Garibay, Miguel A; Bazan, Guillermo C.; Physical chemistry chemical physics : PCCP 16 (2014) 12980–12986; doi:10.1039/c4cp01036a

data_7216135
_publ_section_title
;
 A fullerene-carbene adduct as a crystalline molecular rotor: remarkable
 behavior of a spherically-shaped rotator.
;
_journal_issue                   25
_journal_name_full               'Physical chemistry chemical physics : PCCP'
_journal_page_first              12980
_journal_page_last               12986
_journal_paper_doi               10.1039/c4cp01036a
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C87 H36 N2'
_chemical_formula_sum            'C87 H36 N2'
_chemical_formula_weight         1109.18
_chemical_melting_point          'Decomposition >500 C'
_chemical_name_common            IDipp-C60
_chemical_name_systematic
; 
 1,3-bis(diisopropylphenyl)imidazol-2-ylidene-C60 adduct 
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.6446(7)
_cell_length_b                   18.2957(6)
_cell_length_c                   15.0193(7)
_cell_measurement_temperature    280(2)
_cell_volume                     5123.3(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_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      280(2)
_diffrn_measured_fraction_theta_full 0.971
_diffrn_measured_fraction_theta_max 0.971
_diffrn_measurement_device_type  'Bruker Kappa APEX II'
_diffrn_measurement_method       'Omega scan'
_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  0.0384
_diffrn_reflns_av_sigmaI/netI    0.0407
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            17849
_diffrn_reflns_theta_full        28.27
_diffrn_reflns_theta_max         28.27
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6780
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.438
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2288
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.318
_refine_diff_density_min         -0.169
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     413
_refine_ls_number_reflns         6357
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0914
_refine_ls_R_factor_gt           0.0489
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0553P)^2^+1.3815P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1179
_refine_ls_wR_factor_ref         0.1397
_reflns_number_gt                3897
_reflns_number_total             6357
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cp01036a4.cif
_cod_data_source_block           280k
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 7216130--7216142.cif.
;
_cod_original_sg_symbol_H-M      Pnma
_cod_database_code               7216135