Novel mononuclear zirconium and hafnium alkoxides; improved precursors for the MOCVD of ZrO2 and HfO2
Williams, Paul A.; Roberts, John L.; Jones, Anthony C.; Chalker, Paul R.; Bickley, Jamie F.; Steiner, Alexander; Davies, Hywel O.; Leedham, Timothy J.; Journal of Materials Chemistry 12 (2002) 165–; doi:10.1039/b109994a

data_7204313
_publ_section_title
;
 Novel mononuclear zirconium and hafnium alkoxides; improved precursors
 for the MOCVD of ZrO2 and HfO2
;
_journal_issue                   2
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              165
_journal_paper_doi               10.1039/b109994a
_journal_volume                  12
_journal_year                    2002
_chemical_formula_sum            'C18 H40 O6 Zr'
_chemical_formula_weight         443.72
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   10.2970(12)
_cell_length_b                   10.7861(12)
_cell_length_c                   21.258(2)
_cell_measurement_reflns_used    6142
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      55.981
_cell_measurement_theta_min      5.380
_cell_volume                     2361.0(4)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SHELXTL (Bruker, 2000)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.947
_diffrn_measured_fraction_theta_max 0.947
_diffrn_measurement_device_type  'Bruker Apex CCD area detector'
_diffrn_measurement_method       '\w scans'
_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  0.1032
_diffrn_reflns_av_sigmaI/netI    0.0800
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            14636
_diffrn_reflns_theta_full        28.29
_diffrn_reflns_theta_max         28.29
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    0.491
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.248
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.670
_refine_diff_density_min         -0.899
_refine_diff_density_rms         0.075
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.02(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.728
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         5439
_refine_ls_number_restraints     68
_refine_ls_restrained_S_all      0.746
_refine_ls_R_factor_all          0.0452
_refine_ls_R_factor_gt           0.0389
_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^)+(0.0885P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0990
_refine_ls_wR_factor_ref         0.1030
_reflns_number_gt                4699
_reflns_number_total             5439
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b109994a.txt
_cod_data_source_block           tony67m
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_cell_volume        2361.1(5)
_cod_database_code               7204313