{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361699994044347904.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1063/1.1670082"}},{"identifier":{"@type":"URI","@value":"https://pubs.aip.org/aip/jcp/article-pdf/49/12/5526/18859684/5526_1_online.pdf"}},{"identifier":{"@type":"NAID","@value":"30015694953"}}],"dc:title":[{"@value":"Determination of Bond Dissociation Energies in Hydrogen Cyanide. Cyanogen and Cyanogen Halides by the Photodissociation Method"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The photodissociation process yielding CN B 2Σ+ from various cyanogen compounds has been studied in the vacuum ultraviolet. Threshold energies of incident photon to produce the CN B 2Σ+ are measured by monitoring the fluorescence due to the transition CN B 2Σ+ − X 2Σ+. The upper bounds of bond energies can be obtained from these thresholds and the electronic energy of CN B 2Σ+. The heat of formation of CN, ΔHf0° (CN), is computed using these bond energies together with various ΔHf0°. ΔHf0° (CN) of 101 ± 1 kcal mole−1 (422 kJ mole−1) is obtained from the lowest two values measured. This value is within an estimated error in excellent agreement with the photoionization value recently obtained by Dibeler and Liston. The bond energies based on ΔHf0°(CN) = 101 kcal mole−1 for various cyanogen compounds are D(H–CN) = 120, D(Cl–CN) = 97, D(Br–CN) = 83, D(I–CN) = 73, D(NC–CN) = 128, D(C–N) = 184 all in kilocalories per mole with an over-all estimated error of ± 1 kcal mole−1. Because of the weak fluorescence intensity, no reliable bond energy was obtained for CH3CN. Other values obtained are D(F–CN) ≤ 111 kcal mole−1 and ΔHf0°(FCN) ≥ 7.4 kcal mole−1. A correlation of the dissociation process with the absorption spectrum is briefly discussed. A comparison is made of bond energies obtained by the photodissociation, photoionization, and electron-impact methods. Limitations of the photodissociation method to determine bond energies are discussed.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699994044347904","@type":"Researcher","foaf:name":[{"@value":"Douglas D. Davis"}],"jpcoar:affiliationName":[{"@value":"U. S. Department of Commerce, National Bureau of Standards, Washington, D. C."}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994044348032","@type":"Researcher","foaf:name":[{"@value":"H. Okabe"}],"jpcoar:affiliationName":[{"@value":"U. S. Department of Commerce, National Bureau of Standards, Washington, D. C."}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00219606"},{"@type":"EISSN","@value":"10897690"}],"prism:publicationName":[{"@value":"The Journal of Chemical Physics"}],"dc:publisher":[{"@value":"AIP Publishing"}],"prism:publicationDate":"1968-12-15","prism:volume":"49","prism:number":"12","prism:startingPage":"5526","prism:endingPage":"5531"},"reviewed":"false","url":[{"@id":"https://pubs.aip.org/aip/jcp/article-pdf/49/12/5526/18859684/5526_1_online.pdf"}],"createdAt":"2004-02-06","modifiedAt":"2024-02-09","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002219100695424","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Formation of CN(B2Σ+) in the Reaction of Acetonitrile with Metastable Ar(3P2,0) Atoms"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283694077498112","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Violet Emission Spectra of CN(B2Σ) Produced in the Photodissociation of HCN and DCN"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283694082903936","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"EMISSION SPECTRA OF THE CN RADICAL PRODUCED BY THE REACTION OF METASTABLE ARGON ATOMS WITH CH3CN AND HCN"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565169054095744","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Violet Emission Bands of the CN Radical Produced by Photodissociation of BrCN"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001205512647296","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Fabrication of a-CN<sub><i>x</i></sub> films by RF-plasma decomposition of BrCN"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206255138176","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Mechanism of Formation of the CN(B2.SIGMA.+) State from Dissociative Excitation Reaction of BrCN with Electron Cyclotron Resonance Plasma of Ar."},{"@value":"Mechanism of Formation of the CN(B2Σ+) State from Dissociative Excitation Reaction of BrCN with Electron Cyclotron Resonance Plasma of Ar"},{"@language":"ja-Kana","@value":"Mechanism of Formation of the CN B2 シグマ State from Dissociative Excitation Reaction of BrCN with Electron Cyclotron Resonance Plasma of Ar"},{"@value":"Mechanism of Formation of the CN(B<sup>2</sup>Σ<sup>+</sup>) State from Dissociative Excitation Reaction of BrCN with Electron Cyclotron Resonance Plasma of Ar"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206257057152","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Ion-Induced Processes in the Dissociative Excitation Reaction of BrCN to Synthesize Mechanically Hard Amorphous Carbon Nitride Films in the Microwave Plasma Chemical Vapor Deposition System."}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681240408448","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Measurement of the Active Species Density for the Synthesis of Amorphous Carbon Nitrides I. Metastable Atoms and Electrons in the Microwave Discharge Flow of Ar"},{"@value":"Measurement of the Active Species Density for the Synthesis of Amorphous Carbon Nitrides 1. Metastable Atoms and Electrons in the Microwave Discharge Flow of Ar"}]},{"@id":"https://cir.nii.ac.jp/crid/1520572357543632768","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Vacuum Ultraviolet and Ultraviolet Radiation-Induced Effect of Hydrogenated Silicon Nitride Etching : Surface Reaction Enhancement and Damage Generation"}]},{"@id":"https://cir.nii.ac.jp/crid/1572543024851735296","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Roles of Ions and Free Electrons in the Synthesis of Mechanically Hard Amorphous-CNx Films Using a Dissociative Excitation Reaction of BrCN with the Ar Electron Cyclotron Resonance Plasma"}]},{"@id":"https://cir.nii.ac.jp/crid/1572543027168932864","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Threshold Ionizaiton Mass Spectrometry of BrCN: Gas-Phase Reaction Channels Which Determine the Nitrogen Contents in Amorphous Carbon Nitride Films"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1063/1.1670082"},{"@type":"CIA","@value":"30015694953"},{"@type":"CROSSREF","@value":"10.1143/jjap.51.026201_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"},{"@type":"CROSSREF","@value":"10.14723/tmrsj.38.677_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"},{"@type":"CROSSREF","@value":"10.1246/bcsj.50.1449_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"},{"@type":"CROSSREF","@value":"10.7567/jjap.51.026201_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"},{"@type":"CROSSREF","@value":"10.1246/bcsj.50.1056_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"},{"@type":"CROSSREF","@value":"10.1246/bcsj.50.2896_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"},{"@type":"CROSSREF","@value":"10.1246/cl.1972.813_references_DOI_SLjzm9hNkzYrbH382REyJfUlmQy"}]}