Bond-length dependence

Hettema H, Wormer P E S and Thakkar A J 1993 Intramolecular bond length dependence of the... 

The structures of the cis- and trans-isomers of Pt(PEt3)2Cl4 have been determined [176]. Table 3.26 shows the bond lengths depend slightly on the trans-ligand. 

Measurements of the bond angles and lengths for typical acyclic and unstrained cyclic sulphones show that the OSO angle is in the range of 116 to 120° (mean, 118°)5, the CSC angle is in the range of 103 to 105°78, and the C—S bond length depends on whether it is to a terminal (i.e., methyl) carbon or to a carbon in a chain. The nature of the substituents on the carbon is also relevant, but if these are nonpolar or not especially bulky, the C—-S... 

Based on the bond length dependence of lODq, the fact that II does not vary to any great extent, and that in a complex the Racah parameters of electron-electron repulsion are typically reduced to 70 to 80% of their free ion values, the zero-point energy difference, A °hl= 0hs- °ls> between the high-spin and the low-spin state can be estimated as a function of 10DqHS as well as of lODq15 (see Fig. 5). For 10DqHS< 10,000 cm, A °Hl< 0, that is, the... 

The S—S bond distances observed in various compounds range from 1.89 A in Sg (5) and SgFg (56) to 2.20 A in SgO (105). The bond length depends on molecular geometry and substitution. Normally, the bond distance is close to 2.05 A (Table I). The S—S—S bond angle lies between... 

Coefficients for bond length dependence of chemical potential... 

Wormer PES, Hettema H, Thakkar AJ (1993) Intramolecular bond length dependence of the anisotropic dispersion coefficients for H2-rare gas interactions. J Chem Phys 98 7140-7144... 

The Te4 + is a 6n electron square-planar dication. Numerous structures containing different counterions have been determined by X-ray crystallography. The formal bond order is 1.25, but it has been noted that the bond length depends on the nature of the counterions spanning a range of 2.660 2.695 A (see Figure 9). In each salt there are close contacts between the cations and anions, in which the halogen... 

It has long been known that the electronic spectrum of hex henyldi-stannane (18) exhibits a strong absorption maximum 247 nm 40,400), which has been attributed to the presence of the Sn-Sn bond in this compound (37,38). If this absorption feature correlates with a o sn-sn" o sn-sn transition, then one might expect to observe a Sn-Sn bond length dependence on its strength and position. Indeed, the observation that it has shifted to 287 nm (e a, 20,382) in the sterically encumbered... 

However, it is well-known that bond energies and bond lengths depend not only on the corresponding bond order but also on its polarity. Thus, recent calculations (refs. 131 and 132) indicate that the participation of 3d orbitals has been overemphasized and that octet structures, when associated with the polarity of the bonds, constitute a better description (see also refs. 133 and 134). For example ... 

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