Preparative and 1H NMR Spectroscopic Studies on Palladium(II) and Platinum(II) Quinoline-8-carbaldehyde (1) Complexes. X-Ray Structures of the Cyclometalated Acyl Complex PdCl(C(O)C9H6N)(PPh3)PPh3 and trans-PtCl2(1)(PEt3)