Nuclear magnetic resonance study of the rearrangement of 2-(5-cyanotetrazolato)pentaammine cobalt (III) perchlorate

Technical Report · Fri Mar 15 04:00:00 EST 1985

OSTI ID:5961904

Pitre, E M; Attalla, A

The activation energy, E/sub a/, for the intramolecular rearrangement of the secondary-explosive transition-metal coordination compound (2-(5-cyanotetrazolato)pentaammine cobalt (III) perchlorate (CP)) to its amidine complex was determined by variable-temperature, high-resolution, nuclear magnetic resonance (NMR) spectroscopy. A 30 wt % concentration of CP dissolved in deuterated dimethylsulfoxide (DMSO-d/sub 6/) was maintained at five different temperatures for sufficient time to effect its transformation to the amidine complex. A specific reaction rate constant, k, was determined at each temperature form the rate of rearrangement of CP (..delta.. (amidine)/..delta..t). Temperatures ranged from 60/sup 0/C to 100/sup 0/C in 10/sup 0/ increments. The Arrhenius relationship ((k = Aexp(-E/sub a//RT)) was applied to a plot of log k as a function of reciprocal absolute temperature where the slope is -E/sub a//2.303R, and the activation energy was calculated. The variable-temperature NMR method, as well as the analytical techniques used to obtain the kinetic data, are presented, and the final results are discussed. 6 references, 11 figures, 1 table.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound
• DOE Contract Number: AC04-76DP00053
• OSTI ID: 5961904
• Report Number(s): MLM-3226; ON: DE85008915
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
AMMINES
ARRHENIUS EQUATION
AZOLES
CARBONIC ACID DERIVATIVES
CHEMICAL REACTION KINETICS
CHLORINE COMPOUNDS
COBALT COMPLEXES
COBALT COMPOUNDS
COBALT PERCHLORATES
COMPLEXES
CYANAMIDES
DATA
ENERGY
EQUATIONS
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PERCHLORATES
REACTION KINETICS
RESONANCE
TETRAZOLES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS