Rational synthesis of unidimensional mixed valence solids. Structure oxidation state-charge transport relationships in iodinated nickel and palladium bisbenzoquinonedioximates

Journal Article · Wed May 23 00:00:00 EDT 1979 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00505a022· OSTI ID:5939050

Brown, L D ^[1]; Kalina, D W; McClure, M S; Schultz, S; Ruby, S L; Ibers, J A; Kannewurf, C R; Marks, T J

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1. Northwestern Univ., Evanston, IL

A detailed study is presented of crystal structure, stoichiometry, oxidation state, and electron transport in the materials Ni(bqd)/sub 2/, Pd(bqd)/sub 2/, Ni(bqd)/sub 2/I/sub 0/ /sub 018/, Ni(bqd)/sub 2/I/sub 0/ /sub 5/ . S, and Pd(bqd)/sub 2/I/sub 0/ /sub 5/ . S, where bqd = o-benzoquinonedioximato and S = an aromatic solvent. The compound Pd(bqd)/sub 2/I/sub 0/ /sub 50/ . 0.52o-C/sub 6/H/sub 4/Cl/sub 2/ was shown by single-crystal x-ray diffraction to crystallize in the tetragonal space group D/sub 4h//sup 2/-P4/mcc, with four formula units in a cell of dimensions a = 16.048 (7) and c = 6.367 (3) A. The crystal structure consists of stacked Pd(bqd)/sub 2/ units, each staggered by 65/sup 0/ with respect to its nearest neighbors, and disordered chains of iodine atoms extending in the c direction. The Pd--Pd distance is 3.184 (3) A, Pd--N = 1.996 (7) A, and the Pd(bqd)/sub 2/ units are rigorously planar. The predominant form of the iodine present is I/sub 3//sup -/ (..nu../sub fundamental/ 107 cm/sup -1/). Crystallization of Ni(bqd)/sub 2/ from benzene containing traces of iodine produces the new orthorhombic phase Ni(bqd)/sub 2/I/sub 0/ /sub 018/. It crystallizes in the space group D/sub 2h//sup 26/-Ibam with four formula units in a unit cell of dimensions a = 16.438 (2), b = 14.759 (4), and c = 6.360 (2) A. Full-matrix least-squares refinement gave a final value of the conventional R index (on F) of 0.11 for 1026 reflections having F/sub 0//sup 2/ > 3 sigma(F/sub 0//sup 2/). The structure contains rigorously planar Ni(bqd)/sub 2/ units stacked along the c axis with each molecule staggered by 68/sup 0/ with respect to its nearest neighbors. The Ni--Ni distance is 3.180 (2) A and Ni--N = 1.88 (10) A. Single-crystal electrical conductivity measurements (dc and 100-Hz ac) in the stacking direction show an increase in conductivity upon partial oxidation of >10/sup 3/ (Ni) and >10/sup 4/ (Pd). Maximum conductivities at 300 K are determined.

• OSTI ID: 5939050
• Journal Information: J. Am. Chem. Soc.; (United States), Vol. 101:11
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
NICKEL COMPLEXES
STRUCTURAL CHEMICAL ANALYSIS
PALLADIUM COMPLEXES
ACTIVATION ENERGY
BENZENE
CHLORINATED AROMATIC HYDROCARBONS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ESTERS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INTERATOMIC DISTANCES
ISOLATED VALUES
LATTICE PARAMETERS
LEAST SQUARE FIT
MOESSBAUER SPECTROMETERS
MOLECULAR STRUCTURE
MONOCRYSTALS
OPTICAL SPECTROMETERS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SOLVENTS
ORTHORHOMBIC LATTICES
RAMAN SPECTRA
STOICHIOMETRY
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES
VALENCE
X-RAY DIFFRACTION
AROMATICS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTALS
DATA
DATA FORMS
DIFFRACTION
DISTANCE
ELECTRICAL PROPERTIES
ENERGY
GAMMA SPECTROMETERS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
INFORMATION
MAXIMUM-LIKELIHOOD FIT
MEASURING INSTRUMENTS
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SOLVENTS
SPECTRA
SPECTROMETERS
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)