Frau Professor Marianne Baudler zum 80. Geburtstag gewidmet Inhaltsu È bersicht. t Bu 2 P±P=P(Me) t Bu 2 (1) bildet mit (Et 3 P) 2 NiCl 2 (2) und Na(Nph) das [l-(1,3 : 2,3-gt Bu 2 P 4 t Bu 2 ){Ni(PEt 3 )Cl} 2 ] (3) als Hauptprodukt. Mit Na/Hg als Reduktionsmittel entstehen dagegen die Ni 0 -Verbindungen [{g 2 -t Bu 2 P±P}Ni(PEt 3 ) 2 ] (4), [{g 2 -t Bu 2 P±P=P±P t Bu 2 }-Ni(PEt 3 ) 2 ] (5) und [(Et 3 P)Ni(l-P t Bu 2 )] 2 (6) mit Ni 2 P 2 -Vier-ringstruktur. [{g 2 -C 2 H 4 }Ni(PEt 3
) 2 ] bildet mit 1 ebenfalls Verbindung 4. Die Verbindungen sind u È ber 1 H-und 31 P{ 1 H}-NMR-Untersuchungen gesichert. Von 3 liegt die Einkristallstrukturuntersuchung vor, es kristallisiert triklin in der Raumgruppe P 1 mit a = 1129,4(2), b = 1256,8(3), c = 1569,5(3) pm, a = 72,44(3)°, b = 70,52(3)°und c = 74,20(3)°.
Coordination Chemistry of P-rich Phosphanes and Silylphosphanes. XXIII Reactions of t Bu 2 P±P=P(Me) t Bu 2 with (Et 3 P) 2 NiCl 2 and [{g 2 -C 2 H 4 }Ni(PEt 3 ) 2 ] Abstract. t Bu 2 P±P=P(Me) t Bu 2 (1) forms with (Et 3 P) 2 NiCl 2
(2) and Na(Nph) the [l-(1,3 : 2,3-g-t Bu 2 P 4 t Bu 2 ){Ni(PEt 3 )Cl} 2 ] (3) as main product. Using Na/Hg instead as reducing agent the Ni 0 compounds [{g 2 -t Bu 2 P±P}Ni(PEt 3 ) 2 ] (4), [{g 2 -t Bu 2 P±P=P±P t Bu 2 }Ni(PEt 3 ) 2 ] (5) and [(Et 3 P)Ni(l-P t Bu 2 )] 2 (6) with four-membered Ni 2 P 2 ring result. [{g 2 -C 2 H 4 }Ni(PEt 3 ) 2 ] yields with 1 also 4. The compounds were characterized by 1 H and 31 P{ 1 H} NMR investigations and 3 also by a single crystal X-ray analysis. It crystallizes triclinic in the space group P 1 with a = 1129.4(2), b = 1256.8(3), c = 1569.5(3) pm, a = 72.44(3)°, b = 70.52(3)°and c = 74.20(3)°.