The ECW Model

Glenn C. Vogel
Ithaca College, Ithaca, NY 14850
Russell S. Drago
University of Florida, Gainesville, FL 32611
J. Chem. Educ., 1996, 73 (8), p 701
DOI: 10.1021/ed073p701
Publication Date (Web): August 1, 1996

Abstract

The ECW model is a powerful tool for developing an understanding of donor-acceptor interactions. Most modern inorganic chemistry textbooks discuss the model's ability to correlate and predict enthalpies of adduct formation but overlook the application of the E and C parameters as a scale to analyze reactivity and spectroscopy. Furthermore, a survey of these textbooks indicate the authors are using parameters of different vintages. This article provides the teacher with the latest parameters as well as an update of the traditional uses of the ECW model and a discussion of some of the more important, often overlooked, applications of the model.

Keywords (Audience):

Graduate Education / Research

Keywords (Domain):

Inorganic Chemistry

Keywords (Subject):

Lewis Acids / Bases

Citing Articles

View all 9 citing articles

Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.

This article has been cited by 9 ACS Journal articles (5 most recent appear below).

  • Cover Image

    Lewis Acidity of Methyltrioxorhenium(VII) (MTO) Based on the Relative Binding Strengths of N-Donors

    S. Masoud Nabavizadeh and Mehdi Rashidi
    Journal of the American Chemical Society2006 128 (1), 351-357
    • Lewis Acidity of Methyltrioxorhenium(VII) (MTO) Based on the Relative Binding Strengths of N-Donors

      S. Masoud Nabavizadeh and Mehdi Rashidi
      Journal of the American Chemical Society2006 128 (1), 351-357

      This article presents a acceptor strength scale for methyltrioxorhenium(VII) (MTO), one of the most versatile and useful high oxidation state organometallics ever described. The spectrophotometric titration of MTO with a series of N-donor bases in CCl4 ...

  • Cover Image

    Energetics of Alkylbenzyl Radicals:  A Time-Resolved Photoacoustic Calorimetry Study

    Vânia S. F. Muralha, Rui M. Borges dos Santos, and José A. Martinho Simões
    The Journal of Physical Chemistry A2004 108 (6), 936-942
    • Energetics of Alkylbenzyl Radicals:  A Time-Resolved Photoacoustic Calorimetry Study

      Vânia S. F. Muralha, Rui M. Borges dos Santos, and José A. Martinho Simões
      The Journal of Physical Chemistry A2004 108 (6), 936-942

      The PhCH2H bond dissociation enthalpy in solution was determined for the first time as 380.5 5.1 kJ mol-1, from a time-resolved photoacoustic calorimetry study (TRPAC) in toluene. The derived gas-phase result, 375.5 5.0 kJ mol-1, allows the ...

  • Cover Image

    Solvent Effects on the Energetics of the Phenol O−H Bond:  Differential Solvation of Phenol and Phenoxy Radical in Benzene and Acetonitrile

    R. C. Guedes, Kaline Coutinho, B. J. Costa Cabral, Sylvio Canuto, C. F. Correia, R. M. Borges dos Santos, and J. A. Martinho Simões
    The Journal of Physical Chemistry A2003 107 (43), 9197-9207
    • Solvent Effects on the Energetics of the Phenol O−H Bond:  Differential Solvation of Phenol and Phenoxy Radical in Benzene and Acetonitrile

      R. C. Guedes, Kaline Coutinho, B. J. Costa Cabral, Sylvio Canuto, C. F. Correia, R. M. Borges dos Santos, and J. A. Martinho Simões
      The Journal of Physical Chemistry A2003 107 (43), 9197-9207

      Monte Carlo statistical mechanics simulations, density-functional theory calculations, time-resolved photoacoustic calorimetry, and isoperibol reaction-solution calorimetry experiments were carried out to investigate the solvation enthalpies and solvent ...

  • Cover Image

    Inherent Acidity of Aqua Metal Ions in Solids:  An Assay in Layered Aluminosilicates

    María D. Alba, Ana I. Becerro, Miguel A. Castro, Ana C. Perdigón, and José M. Trillo
    The Journal of Physical Chemistry B2003 107 (17), 3996-4001
    • Inherent Acidity of Aqua Metal Ions in Solids:  An Assay in Layered Aluminosilicates

      María D. Alba, Ana I. Becerro, Miguel A. Castro, Ana C. Perdigón, and José M. Trillo
      The Journal of Physical Chemistry B2003 107 (17), 3996-4001

      Structural information on 2:1 layered silicates has been obtained from 1H magic angle spinning nuclear magnetic resonance measurements, the acidity of aqua metal ions in the interlayer space being determined. Representative end-members of the smectite ...

  • Cover Image

    S−H Bond Dissociation Enthalpies in Thiophenols:  A Time-Resolved Photoacoustic Calorimetry and Quantum Chemistry Study

    Rui M. Borges dos Santos, Vânia S. F. Muralha, Catarina F. Correia, Rita C. Guedes, Benedito J. Costa Cabral, and José A. Martinho Simões
    The Journal of Physical Chemistry A2002 106 (42), 9883-9889
    • S−H Bond Dissociation Enthalpies in Thiophenols:  A Time-Resolved Photoacoustic Calorimetry and Quantum Chemistry Study

      Rui M. Borges dos Santos, Vânia S. F. Muralha, Catarina F. Correia, Rita C. Guedes, Benedito J. Costa Cabral, and José A. Martinho Simões
      The Journal of Physical Chemistry A2002 106 (42), 9883-9889

      Time-resolved photoacoustic calorimetry (TR-PAC) and quantum chemistry calculations were used to investigate the energetics of sulfurhydrogen bonds in thiophenol and four para-substituted thiophenols, 4-XC6H4SH (X = CH3, OCH3, Cl, and CF3). The result ...

Tools

SciFinder Links

SciFinder subscribers:  Click to sign in | Not a SciFinder subscriber? Learn more at www.cas.org

Explore by:


History

  • Received: August 03, 2009

Recommend & Share

  • Share on ACS NetworkACS Network
  • Add to FacebookFacebook
  • Tweet ThisTweet This
  • Add to CiteULikeCiteULike
  • Add to NewsvineNewsvine
  • Digg ThisDigg This
  • Add to DeliciousDelicious

Related Content