Type of the bond

In the discussion of metallic radii we may make a choice between two immediate alternative procedures. The first, which I shall adopt, is to consider the dependence of the radius on the type of the bond, defined as the number (which may be fractional) of shared electron pairs involved (corresponding to the single, double, and triple bonds in ordinary covalent molecules and crystals), and then to consider separately the effect of resonance in stabilizing the crystal and decreasing the interatomic distance. This procedure is similar to that which we have used in the discussion of interatomic distances in resonating molecules.7 The alternative procedure would be to assign to each bond a number, the bond order, to represent the strength of the bond with inclusion of the resonance effect as well as of the bond type.8... 

Hypervalency is not a consequence of some special type of the bonding. The bonds in hypervalent molecules are similar to those in any other molecules and may range from predominately ionic to predominately covalent. 

Electronegativity is a term which was first proposed in 1934 by the American physicist R.S. Mulliken. It is especially useful in explaining the type of the bond occurring between atoms. 

Identify the types of the bonds in the NH3BC13 molecule which is formed by the... 

Method of immobilization Type of the bond Amount of heparin, mg/cm2... 

The set of bonds that form a DE-system. Depending on the type of the bond, this set may be empty. Each bond may only be contained in one DE-system. 

Bond valence sum is calculated using interatomic distances and empirical bond valence parameters tabulated for each type of the bond. The analysis was conducted using VaList software [A.S. Wills and I.D. Brown, VaList, CEA, France (1999)], available from ftp //ftp.ill.fr/pub/dif/valist/. 

The selectivity of a separation is not only a function of the type of the bonded phase but can also depend on the spacing of the bonded-phase chains and the availability and activity of residual silanols. If we want to achieve highly reproducible separations, it is therefore very important that the composition of the stationary phase be tightly controlled. Luckily, the technology for preparation of silica-based bonded phases is now over 20 years old, and manufacturers have had ample time to learn to measure and control the important properties of bonded phases. 

As atoms move to new processors in step (5) the molecular connectivity information should be exchanged and updated between processors. This requires extra communication cost, depending on the type of the bonded interactions. 

On the base of the analysis of the interatomic distances and the coordinations of atoms it was concluded that the Snl, R and Rh atoms have a behaviour which is similar to cations, the Sn2 atoms have a behaviour which is similar to anions, and in the compound there is an ionic-covalent type of the bond (Hodeau et al. 1980, Miraglia et al. 1986). The authors draw a parallel between the SniR3Rh4Sni2 structure and the stmcture of the ternary oxides A A"B40i2 similar to perovskite. 

The presence of multiple or aromatic bonds, or of heteroatoms, in molecular graphs requires the development of special parameters. Each vertex v, in the molecular graph is characterized by a parameter (weight) Vw which depends on the chemical nature of the vertex v, while each edge eij is characterized by a parameter (weight) Ew,y depending on the chemical nature of the vertices v, and vj and on the type of the bond between them. 

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