Some Significant Results in Crystal Structure Analysis.

Huggins, Maurice L.

doi:10.1021/cr60037a002

Cited by 24 publications

(6 citation statements)

References 21 publications

(34 reference statements)

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“…The van der Waals radius , R vdW , of an element A could similarly be derived by halving the A···A distance in a nonbonding interaction, eq 11, see ref or, in principle, by using eq 12. As well-known to the originators of the concept, , the use of eq 11 is problematic because the A···A distances in different compounds vary a great deal. It is simply not obvious, especially for the heavier elements, which case represents a “normal” van der Waals distance.…”

Section: The Simplest Models: Radiimentioning

confidence: 99%

Strong Closed-Shell Interactions in Inorganic Chemistry

1997

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Section: The Simplest Models: Radiimentioning

confidence: 99%

Strong Closed-Shell Interactions in Inorganic Chemistry

1997

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“…Atom charges in Lewis diagrams were first introduced in a general way as “residual charge” by Langmuir . The first use of the term “formal charge” that I can find is in a paper by Huggins …”

Section: Atom Charges In Lewis Structuresmentioning

confidence: 99%

Systematic Procedure for Drawing Lewis Structures Based on Electron Pairing Priority and the Explicit Use of Donor Bonds: An Alternative to the Normal Procedure Which Can Be Pen and Paper Based or Automated on a PC in User Interactive 3D

McArdle

2019

J. Chem. Educ.

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This article contrasts the normal method for drawing Lewis structures with a two-step systematic approach. The latter approach uses a known molecular connectivity and a knowledge of the number of valence electrons that each atom possesses to visualize bonds that are formed by pairing electrons, one from each atom. This process is repeated until at least one of the non-hydrogen atoms in each bond has an octet. Donor bonds are added when atoms with six and eight electrons are adjacent. In forming donor bonds charges are added to the atoms involved to maintain electron accounting and there is no need to use a formula to calculate formal charges. The general importance of adhering to the octet rule for p-block compounds is stressed and the difference between covalent and donor bonds and the use of the recent IUPAC definition of oxidation state which is based on Lewis structures is included in the discussion. When students are able to draw Lewis structures they can be given access to PC software, available on an academic free basis, which will draw rotatable Lewis structures in 3D for p-block compounds. The software allows the user to move electron pairs in a bow and arrow fashion within the structures and atoms are highlighted when the octet is exceeded.

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“…HUGGINS bility of the atom concerned) . The usual structural formula for a salt, according to which the number of bonds joining each metal or halogen ion (for instance) to other atoms equals its valence, does not repre sent the structure accurately (2,3).…”

Section: Introductionmentioning

confidence: 99%

X-Ray Studies of the Structure of Compounds of Biochemical Interest

Huggins¹

1942

Annu. Rev. Biochem.

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Some Significant Results in Crystal Structure Analysis.

Cited by 24 publications

References 21 publications

Strong Closed-Shell Interactions in Inorganic Chemistry

Strong Closed-Shell Interactions in Inorganic Chemistry

Systematic Procedure for Drawing Lewis Structures Based on Electron Pairing Priority and the Explicit Use of Donor Bonds: An Alternative to the Normal Procedure Which Can Be Pen and Paper Based or Automated on a PC in User Interactive 3D

X-Ray Studies of the Structure of Compounds of Biochemical Interest

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