Abstract
According to X-ray analysis data, in the [PbL(H2O)2]2+ complex cation [L = N,N′-di(tetrafluoropyridyl)diaza-18-crown-6], the Pb atom is coordinated asymmetrically by four O(1)–O(4) atoms of the macrocycle and two O(5), O(6) atoms of water molecules, and, additionally, at longer distances, by the ortho-fluorine atoms F(4), F(5) of two perfluoropyridyl rings and the N(1), N(2) atoms of the macrocycle, thus demonstrating a partial localization of the lone electron pair of Pb. Using 1H NMR, the stability of the complex of L with Pb(ClO4)2 in [2H6]acetone was estimated (log β = 0.9).
References
1.
Plenio H., Diodone R.
Journal of the American Chemical Society,
1996
2.
Plenio H.
Chemical Reviews,
1997
3.
10.1070/MC2006v016n03ABEH002323_bib3
Sazonov
Zh. Org. Khim,
2006
4.
Izatt R.M., Pawlak K., Bradshaw J.S., Bruening R.L.
Chemical Reviews,
1995
5.
10.1070/MC2006v016n03ABEH002323_bib5
Sazonov
Izv. Akad. Nauk, Ser. Khim.,
2005
6.
L. Kh. Minacheva, P. K. Sazonov, V. S. Sergienko, G. A. Artamkina,I. P. Beletskaya and A. Yu. Tsivadze, Zh. Neorg. Khim., 2006, 51, in press.
7.
10.1070/MC2006v016n03ABEH002323_bib7
Sheldrick
SHELXS-97. Program for the Solution of Crystal Structures,
1997
8.
10.1070/MC2006v016n03ABEH002323_bib8
Sheldrick
SHELXL-97. Program for the Refinement of Crystal Structures,
1997
9.
Shelxtl, version 1, Bruker AXS Inc., Madison, Wisconsin, USA, 1998.
10.
10.1070/MC2006v016n03ABEH002323_bib10
Gillespie
The VSEPR Model of Molecular Geometry,
1991
11.
10.1070/MC2006v016n03ABEH002323_bib11
Minacheva
Kristallografiya,
2004
12.
Allen F.H.
Acta Crystallographica Section B Structural Science,
2002
13.
Alfimov M.V., Churakov A.V., Fedorov Y.V., Fedorova O.A., Gromov S.P., Hester R.E., Howard J.A., Kuz’mina L.G., Lednev I.K., Moore J.N.
Journal of the Chemical Society Perkin Transactions 2,
1997