Cyclometalation of Substrates Containing Imine and Pyridyl Anchoring Groups by Iron and Cobalt Complexes

Synthesis and reactivity of cyclometallated platinum (II) compounds containing [C,N,N′] terdentate ligands: Crystal structures of [PtCl{(CH3)2N(CH2)3NCH(4-ClC 6H3)}], [PtCl{(CH3)2N(CH2)3NCH(2-ClC6H3)}] and [PtCl{(CH3)2N(CH2)3NCH(3-(CH3)C6H3)}]

“…The chelate ring presents a strong deviation in its planarity caused by the propyl moiety as reported for analogous compounds [7d,10]. The metallacycle atoms adopt a practically planar arrangement, as shown by the sum of their internal bond angles which is close to 540° [15]. The metallacycle is nearly coplanar with the coordination plane, the dihedral angle between the mean planes ranging from 3.90°(3e) to 5.90°(3b).…”

Cyclometallated platinum(II) compounds with imine ligands derived from amino acids: Synthesis and oxidative addition reactions

“…For compound 3f, the platinum atom displays a planar coordination, the methyl ligand is in a trans position to the nitrogen atom and the C@N group is endo to the cycle. The sum of internal angles of the five-membered endo-metallacycle is 539.1°, which suggest a planar arrangement [18]. The angles between adjacent atoms in the coordination sphere of platinum lie in the range 79.9(4)-97.4(2)°the smallest angle corresponding to the ''bite" angle of the metallacycle and the largest to the N-Pt-P angle.…”

Synthesis, reactivity and crystal structures of platinum (II) and platinum (IV) cyclometallated compounds derived from 2- and 4-biphenylimines

“…In all cases the metallacycles are approximately planar as suggested by the sum of internal angles of the five-membered metallacycles which are in all cases close to 540° [22] and nearly coplanar with both the metallated phenyl and the mean coordination plane. Bond lengths and angles lie in the usual range for analogous compounds [11,14,20].…”