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The title dinuclear platinum(III) complex, [Pt2(C11H2N)2(C5H4NS)4], forms two crystal structures, viz. the non-solvated and acetonitrile-solvated (C2H3N) forms. For both forms, two (2-pyridylphenyl)platinum units are bridged by two pyridine-2-thiolate (pyt) anions in a head-to-tail configuration, and the other two pyridine-2-thiolate anions occupy the axial position, coordinated through their S atoms. The most remarkable difference between the two forms is the orientation of the axial monodentate ligands. Those for the solvated form are located over the 2-pyridylphenyl ligands, being related by a twofold axis which lies through the centre of the Pt—Pt bond, while the axial pyt ligands for the non-solvated form are oriented irregularly, which is attributable to the dimeric arrangement in the crystal. [ABSTRACT FROM AUTHOR]

A novel Pt(II)–diimine complex exhibits an interesting vapochromic shape‐memory behavior. The amorphous form is converted to a red luminescent vapor‐adsorbed form in the presence of alcoholic vapors. The vapor‐adsorbed form can release the vapors without collapse of the porous structure; this enables it to adsorb other vapors. The vapor‐free porous form can easily be converted to the initial amorphous form by manual grinding. These transformations enable the design of a new chemical sensor with vapor history and ON–OFF switching functions. More information can be found in the Full Paper by A. Kobayashi, M. Kato et al. on page 2682 ff. [ABSTRACT FROM AUTHOR]

The neutral square-planar complexes [Pt(RN)2)2(NHCOtBu)2] (R = H, 1; Et, 2) and [Pt(DACH)(NHCOtBu)2] (DACH = 1,2-diaminocyclohexane, 3) act as metalloligands and make bonds to closed-shell Tl(l) ions to afford one- and two-dimensional platinum-thallium oligomers or polymers based on heterobimetallic backbones. A series of heteronuclear platinum(II)-thallium(l) complexes have been synthesized and structurally characterized. The structures of the Pt-TI compounds resulted from [Pt(RN)2)2(NHCOtBu)2] and TIX [X = NO3-, ClO4-, PF6-, and Cp2Fe(Co2)22-] are dependent on both counteranions and the amine substituents. The compounds [Pt(NH3)2(NHCOtBu)2TI]+ (X = NO3, 8; ClO4-, 9) adopt one-dimensional zigzag chain structures consisting of repeatedly stacked [Pt(NH3)2-(NHCOtBu)2TI]+ units, whereas [{Pt(NH3)2(NHCOtBu)2}2TI2]X2 (X = PF6-, 10) consists of a helical chain. Compound 3 reacts with TI+ to give [{Pt(DACH)(NHCOtBu)2}2TI](NO3)-[Pt(DACH)(NHCOtBu)2]·3H2O (14) and one-dimensional polymeric [{Pt(DACH)(NHCOtBu)2}2TI2]X2 (X = ClO4-, 15; PF6-, 16). Reactions of [Pt(DACH)(NHCOCH3)2) with TI+ ions afford one-dimensional coordination polymers [{Pt(DACH)(NHCOCH3)2}2TI2]X2 (X = NO3-, 17; ClO4-, 18; PF6-, 19). The polymeric [{Pt(DACH)(NHCO′)2}TI2]2+ (R = CH3, tBu) complexes adopt helical structures, which are generated around the crystallographic 2 screw axis. The distance between the coils corresponds to the unit cell length, which ranges from 22.58 to 22.68 Å. The platinum-thallium bond distances fall in a narrow range around 3.0 Å. The complexes derived from [Pt(NH3)2(NHCOtBu)2] are luminescent at 77 K. The trinuclear complexes [{Pt(RN)2)(NHCOtBu)2}2TI]+ do not emit at room temperature but are emissive at 77 K, whereas the polymeric platinum-thallium complexes containing 1 ,2-diaminocyclohexane are intensively luminescent at both room temperature and 77 K. The color variations are interesting; 15 exhibits intense yellow-green, 16 exhibits green, and 17-19 exhibit blue luminescence. The presence of bonding between platinum and thallium is supported by the short metal-metal separations and the strong low-energy luminescence of these compounds in their solid states. [ABSTRACT FROM AUTHOR]