Novel cyclopalladated ferrocenyl Schiff base compounds with bridging and chelating diphosphines. Crystal and molecular structure of [{Pd[(η5-C5H5)Fe(η5-C5H3)C(H)N-2,4,6-Me3C6H2]}{Ph2P(CH2)nPPh2P,P}][PF6] (n=1, 2)

Abstract The reaction of the ferrocenylimine (η 5 -C 5 H 5 )Fe(η 5 -C 5 H 4 )C(H)NR (R=2,4,6-Me 3 C 6 H 2 ) ( a ), with Pd(AcO) 2 or with Li 2 [PdCl 4 ] leads to the heterotetrametallic compounds [Pd{(η 5 -C 5 H 5 )Fe(η 5 -C 5 H 3 )C(H)NR}(μ-O 2 CMe)] 2 ( 1 ) and [Pd{(η 5 -C 5 H 5 )Fe(η 5 -C 5 H 3 )C(H)NR}(μ-Cl)] 2 ( 2 ), respectively. Compound 2 may also be obtained by treatment of 1 with aqueous sodium chloride. Compound 2 reacts with tertiary diphosphines in 1:1 or 1:2 molar ratio to give [{Pd[(η 5 -C 5 H 5 )Fe(η 5 -C 5 H 3 )C(H)NR]Cl} 2 {μ-Ph 2 P(CH 2 ) n PPh 2 }] ( n =1, 3 ; n =2, 4 ; n =3, 5 ; n =4, 6 ), [{Pd[(η 5 -C 5 H 5 )Fe(η 5 -C 5 H 3 )C(H)NR]Cl} 2 (μ-Ph 2 PC 5 H 4 FeC 5 H 4 PPh 2 )] ( 7 ), and [Pd{(η 5 -C 5 H 5 )Fe(η 5 -C 5 H 3 )C(H)NR}{Ph 2 P(CH 2 ) n PPh 2  P , P }][PF 6 ] ( n =1, 8 ; n =2, 9 ; n =3, 10 ; n =4, 11 ), [Pd{(η 5 -C 5 H 5 )Fe(η 5 -C 5 H 3 )C(H)NR}(Ph 2 PC 5 H 4 FeC 5 H 4 PPh 2  P , P )][PF 6 ] ( 12 ), respectively. The crystal structures of compounds 8 and 9 have been determined by X-ray crystallography.