The bis(arene) derivative of titanium(0), Ti(h6-toluene)2, reacts with 9,10-phenanthrenequinone (PQ) with release of tile arene ligands and formation of a diamagnetic brown compound best formulated as a dinuclear titanium(IV) derivative containing both 9,10-phenanthrenesemiquinone (PSQ) and 9,10-phenanthrenediolato (PDA) ligands. MCp2(CO) 2 (M = Zr, Hf) react with PQ to give MCp2PDA which has been characterized by single crystal X-ray diffractometry for M = Zr. Crystal data: C48H 3604Zr2, M = 859.26 g mol-1, monoclinic, space group P21/n (No. 14), a = 11.647(8), b = 17.07(1), c = 18.80(1),~, /3= 97.17(6) °, V= 3709(7)A 3, Z= 4, dcalc := 1.539gcm -3, bt = 5.97 cm -~, F(000) = 1744. The structure consists of dinuclear [ZrCp2PDA] 2 units, the two ZrCp2 groups being bridged by the PDA ligands to give a 10-membered tetraoxazirconacycle.

Redox reactions of low-valent Group 4 organometallics with 9,10-phenanthrenequinone (PQ). Crystal and molecular structure of a 10-membered tetraoxometallacycle of bis(cyclopentadienyl)zirconium(IV)

CALDERAZZO, FAUSTO;PAMPALONI, GUIDO;
1997

Abstract

The bis(arene) derivative of titanium(0), Ti(h6-toluene)2, reacts with 9,10-phenanthrenequinone (PQ) with release of tile arene ligands and formation of a diamagnetic brown compound best formulated as a dinuclear titanium(IV) derivative containing both 9,10-phenanthrenesemiquinone (PSQ) and 9,10-phenanthrenediolato (PDA) ligands. MCp2(CO) 2 (M = Zr, Hf) react with PQ to give MCp2PDA which has been characterized by single crystal X-ray diffractometry for M = Zr. Crystal data: C48H 3604Zr2, M = 859.26 g mol-1, monoclinic, space group P21/n (No. 14), a = 11.647(8), b = 17.07(1), c = 18.80(1),~, /3= 97.17(6) °, V= 3709(7)A 3, Z= 4, dcalc := 1.539gcm -3, bt = 5.97 cm -~, F(000) = 1744. The structure consists of dinuclear [ZrCp2PDA] 2 units, the two ZrCp2 groups being bridged by the PDA ligands to give a 10-membered tetraoxazirconacycle.
Calderazzo, Fausto; Englert, U; Pampaloni, Guido; Koelle, U; Tripepi, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/205659
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