Abstract
Vertical electronic transition energies of diaminosilylenes and their dimers (disilenes and nitrogen-bridged) were investigated by ab initio and density functional calculations. A good linear correlation was found between the observed UV transition energies of various silylenes and disilenes and those of model compounds calculated using the CIS and TD-DFT methods. On the basis of these computations the experimental UV absorption maximum observed for the dimer of (i-Pr2N)2Si: (λmax 439 nm at 77 K), could be assigned to an Si-Si bonded dimer with an unusually long Si-Si distance of 2.472 Å, and the isomeric amino-bridged cyclic dimer could be discarded.
Original language | English |
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Pages (from-to) | 1536-1541 |
Number of pages | 6 |
Journal | Journal of Computational Chemistry |
Volume | 22 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2001 Oct |
Externally published | Yes |
Keywords
- CIS
- Disilenes
- Quantum mechanical calculations
- Silylenes
- TD-DFT
- UV spectra
ASJC Scopus subject areas
- Chemistry(all)
- Computational Mathematics