Spectra with PtCl

Figure 15. Change in the CD spectrum with time on the reaction between tra.nsCN,//)-[PtCl(N-me-L-proXethyl-ene)] (0.00154M) and trans-2-butene (0.279M) in acetone at —28.0°C (22) ...

Figure 8. 31P-CP/MAS solid-state spectrum of polymer-bound (polystyrene cross-linked with 2% divinylbenzene) triphenylphosphine (a), 31P-CP/MAS solid-state spectrum of cis-[PtCl2(PPht-C6H -CH—CH2)2] (referenced to external 85% Hs POJ (b), 31P-CP/MAS solid-state spectrum of a copolymer of 65% styrene, 31% divinylbenzene and 4% cis-/PtCl2(PPh2-C6H -CH CH2)z] after soxhlet extraction (c) and 31P-CP/MAS solid-state spectrum of c s-[PtCl(PPhs)2, (N P )] ClOf after soxhlet extraction (d). All spectra referenced to external 85% HsPOk. (Reproduced from Ref. 21. Copyright by American Chemical Society.)...

Electronic transitions in the absorption spectra of Pt(II) complexes include ligand-field (LF) and charge-transfer (CT) bands and perhaps 5d-6p transitions e.g., the absorption spectrum of aq [PtCl ] displays well-separated LF and CT transitions with a maximum at 480 nm (molar absorbtivity, e = 15 M cm ) assigned to a triplet LF absorption, two maxima at 394 nm (e = 57) and 337 nm (e = 62) assigned to singlet LF absorption, and intense bands 200-250 nm (e > 10 ) to LMCT transitions ". The luminescence of K lPtCl ] in ice occurs from the lowest LF-triplet state, and the molecular geometry of this excited state (ES) may be (distorted T j) rather than D41, (square planar), which is particularly relevant to the photochemistry of Pt(II) complexes. 

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