An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity.

An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Abstract Text:

Evgenii S Stoyanov,Kee-Chan Kim,Christopher A Reed,

The N-H stretching frequencies of tri-n-octylammonium salts are reported for a series of weakly basic anions (A(-)), many of which are the conjugate bases of known strong acids and superacids. Data have been collected primarily in carbon tetrachloride, where Oct(3)N(+)-H...A(-) contact ion pairs are formed. In the more polar solvent 1,2-dichloroethane, some salts form both contact and solvent-separated ion pairs. Salts have also been studied in crystalline form or as oils. In general, the nuNH frequencies decrease in the order fluoroanions > carboranes > oxyanions, reflecting the relative basicities of the anions. By inference, the data reflect differences in the acidity of the corresponding conjugate acids (HA). This qualitative indicator of acid strength is useful because it reflects acidity on an individual molecule basis rather than in bulk. In this respect, it provides a condensed-phase analogy to gas-phase ("intrinsic") acidity and gives insight into the aggregation phenomena that determine bulk acidity. The data also reveal the importance of the chemical stability of conjugate base anions in attaining high acidity and suggest where acids stronger than those presently known may be discovered.

An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Publishing Authors By Initials

ES Stoyanov,KC Kim,CA Reed,

For similar investigative techniques: chemistry, analytical: photometry: spectrophotometry: spectrophotometry, infrared research abstracts see: investigative techniques: chemistry, analytical: photometry: spectrophotometry: spectrophotometry, infrared research

PUBMED ID PMID:

MEDLINE DATE:

An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Journal of the American Chemical Society

VOLUME: 128

Page Numbers: 8500-8

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 0002-7863

DAY: 5

MONTH: Jul

YEAR: 2006

An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 7503056

An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Keywords Mesh Terms:

KEYWORDS: Spectrophotometry, Infrared

MESH TERMS: methods

Chemical & Substance for Abstract: An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity. Information

Substance Name: tri-N-octylamine

Registry Number: 1116-76-3

Grant and Affiliation Information for An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity.

AFFILIATION: Department of Chemistry, University of California, Riverside, CA 92521, USA.

Country: United States

AGENCY: United States NIGMS

GRANT: GM 23851

ACRONYM: GM

MEDLINETA: J Am Chem Soc

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

An infrared nuNH scale for weakly basic anions Implications for single-molecule acidity and superacidity Related Publications

• 14th International HLA and Immunogenetics Workshop: report on understanding antibodies in transplantation.
• A Gynecologic Oncology Group study of platinum-DNA adducts and excision repair cross-complementation group 1 expression in optimal, stage III epithelial ovarian cancer treated with platinum-taxane chemotherapy.
• A locus on mouse Chromosome 9 (Adip5) affects the relative weight of the gonadal but not retroperitoneal adipose depot.
• A phagocytosis mutant of Entamoeba histolytica is less virulent due to deficient proteinase expression and release.
• An infrared nuNH scale for weakly basic anions. Implications for single-molecule acidity and superacidity.
• An interferon signature in the peripheral blood of dermatomyositis patients is associated with disease activity.
• Analysis of the Cob(II)alamin-5'-deoxy-3',4'-anhydroadenosyl radical triplet spin system in the active site of diol dehydrase.
• Biochemical and functional comparisons of Mcl-1 and Bcl-2 proteins: evidence for a novel mechanism of regulating Bcl-2 family protein function.
• Bioinformatic identification of tandem repeat antigens of the Leishmania donovani complex.
• Cathepsin Cs are key for the intracellular survival of the protozoan parasite, Toxoplasma gondii.
• Daxx represses expression of a subset of antiapoptotic genes regulated by nuclear factor-kappaB.
• Deregulated cyclin E promotes p53 loss of heterozygosity and tumorigenesis in the mouse mammary gland.
• Do sitting-atop metalloporphyrin complexes exist? Observation of N-H- - -pi bonding in arene solvates of a diprotonated porphyrin dication.
• Effects of question format and collection mode on the accuracy of retrospective surveys of health risk behavior: a comparison with daily sexual activity diaries.
• Fertility of ewes following artificial insemination with semen frozen in pellets or straws, a preliminary report.
• Free radical mechanisms in enzymology.
• Frequency and amplitude discrimination along the kinestheticcutaneous continuum in the presence of masking stimuli.
• HBXIP, cellular target of hepatitis B virus oncoprotein, is a regulator of centrosome dynamics and cytokinesis.
• IR spectrum of the H(5)O(2)(+) cation in the context of proton disolvates L-H(+)-L.
• Mammalian dap3 is an essential gene required for mitochondrial homeostasis in vivo and contributing to the extrinsic pathway for apoptosis.
• Mice lacking bi-1 gene show accelerated liver regeneration.
• Nur77 converts phenotype of Bcl-B, an antiapoptotic protein expressed in plasma cells and myeloma.
• Pediatric respiratory and systemic effects of chronic air pollution exposure: nose, lung, heart, and brain pathology.
• Physician patterns of metabolic screening for patients taking atypical antipsychotics: a retrospective database study.
• Probing nitrogen-sensitive steps in the free-radical-mediated deamination of amino alcohols by ethanolamine ammonia-lyase.
• Reasons for unprotected intercourse: analysis of the PRAMS survey.
• Reconstituted NALP1 inflammasome reveals two-step mechanism of caspase-1 activation.
• Scope of practice for public health professionals and volunteers.
• The empirical relationship between community social capital and the demand for cigarettes.
• Ubiquitin-conjugating enzyme Ubc13 is a critical component of TNF receptor-associated factor (TRAF)-mediated inflammatory responses.