Structure donor-acceptor complexes

Prout CK, Kamenar B (1973) Crystal structures of electron-donor-acceptor complexes. In Foster R (ed) Molecular complexes. Elek, London, pp 151-207... 

Structural Features of Donor/Acceptor Complexes with Halogen Derivatives... 

Blackstock, S. C., J. P. Lorand, and J. K. Kochi. 1987. Charge Transfer Interactions of Amines with Tetrahalomethanes. X-ray Crystal Structures of the Donor-Acceptor Complexes of Quinuclidine and Diazabicyclo-[2.2.2]octane with Carbon Tetrabromide. J. Qrg. Chem. 52,1451. 

Lappert s compounds E2R4 readily dissociated to ER2 monomers in solution, emphasizing the relationship and leading to the very natural simple description of these CH(SiMe3)2 compounds as a double donor-acceptor complexes. For Dip, Dep and mes species which are more stable in solution, the structures are still close to those of the Lappert compounds. 

In the 1960s, Hassel8 studied the structures of many mixed crystals whose unit cells correspond to noncovalently linked donor-acceptor complexes, such as the... 

Finally, Figure 5.40 displays the surprising structure of the (PtH2)2 dimer, an anti-H-bond n—a donor-acceptor complex. As expected, the leading NBO donor-acceptor interaction is of npt crptH type, but the attack by npt is now on the backside of the cjrh NBO, leading to unusual Pt - -Pt—H coordination to the hydride antibond as depicted in Fig. 5.40b. 

Electrochemistry, organic, structure and mechanism in, 12, 1 Electrode processes, physical parameters for the control of, 10, 155 Electron donor-acceptor complexes, electron transfer in the thermal and photochemical activation of, in organic and organometallic reactions. 29, 185 Electron spin resonance, identification of organic free radicals, 1, 284 Electron spin resonance, studies of short-lived organic radicals, 5, 23 Electron storage and transfer in organic redox systems with multiple electrophores, 28, 1 Electron transfer, 35, 117... 

The electron donor-acceptor complex trimethylamine/dibromine shows a structure151 (by electron diffraction in the gas phase) with an N—Br—Br angle of 112°. On the contrary, the structures of solid152 (CH3N)3/I2 [or (CH3N)3/IC1153] show linear N—I—I (or N-I-Cl) axes. 

These figures are based on published and submitted papers. Among others, carboranes, donor-acceptor complexes of boron, ring molecules with silicon, phosphoranes, sul-fones have received much attention. The lack of gas-phase structural studied of other classes of compounds, e. g., sulfuranes, is also noteworthy. The above elements were selected as most typical. Much interest is concentrated however on other elements as well, which may have been somewhat neglected in the past. The increase of the amount of structural data is also facilitating demand for further extension of the circle of compounds studied. 

The names described here can be used to develop further names with a little more manipulation. Addition compounds (a term that covers donor-acceptor complexes as well as a variety of lattice compounds) of uncertain structure can be named by citing the names of the constituent compounds and then indicating their proportions. Hydrates constitute a large class of compounds that can be represented by this means. 

Interhalogen bonds are accompanied by very low LUMOs see Figure 4.5) and thus can function as good a electron acceptors. The donor-acceptor complexes between ammonia and F2, CI2, and C1F have been investigated theoretically [93] and found to have linear structures, as expected on the basis of the above discussion. 

Predict the structures and bonding in donor-acceptor complexes of ammonia with F2, , and C1F. What are the expected relative bond strengths Are your predictions in accord with the results of high-level theoretical calculations of Roggen and Dahl (Roggcn, I. Dahl, T., J. Am. Chem. Soc., 1992, 114, 511) ... 

The identified structures of the donor-acceptor complexes in the epoxyamine polymers are presented in Schemes (9) and (10). 

---