Bond distances table

The X—N bond distances (Tables 4-8) in XH3NNN and XH3NCZ show the azide being consistently the larger. This is probably because of the smaller XNN bend angle which can introduce steric repulsion effects, and shows that structures with X=N double... 

Both PNDO and MINDO/1 thus use standard values of bond distances (Table 9). In the MINDO/2 program however, Dewar and Hasel-bach 35> seem to have solved the problem outlined above. Their calculation provide both good heats of formation and bond distance for Hydrocarbons and Nitrogen and Oxygen heteromolecules, thus opening a new dimension for application of their method. 

The heterobimetallic compounds 79-83 comprise Ag(I)-Sn(II) covalent bonds, with similar Ag—Sn bonding distances (Table 2.11.3). In particular, compounds 79 and 80 give dimeric arrangements, while in for 81-83, the use of silver fluorinated tris(pyrazolyl)borates and tin(II) N-alkyl-2-(alkylamino)troponiminates allow the isolation of monomeric compounds. 

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