Reactions of cis-[Pt(sulfoxide)2Cl2] with silver salts and synthesis of hydroxo-bridged platinum(II) complexes with sulfoxides

1986 ◽  
Vol 64 (9) ◽  
pp. 1897-1902 ◽  
Author(s):  
Fernande D. Rochon ◽  
Pi-Chang Kong ◽  
Louise Girard
Keyword(s):  
Aqueous Solution ◽  
Infrared Spectroscopy ◽  
Silver Salt ◽  
H Nmr ◽  
Silver Salts

Platinum(II) compounds of the type cis-[Pt(L)2X2] where L = tetramethylenesulfoxide (TMSO), ethylmethylsulfoxide (EMSO), di-n-propylsulfoxide (DPSO), benzylmethylsulfoxide (BMSO), and dibenzylsulfoxide (DBSO) and X = Cl− and I− have been synthesized. The reactions of these compounds with a silver salt were studied in aqueous solution. Monomers of the type cis-[Pt(L)2(ClO4)2] (L = TMSO, EMSO, and DBSO), cis-[Pt(EMSO)2(SO4)] and hydroxy-bridged oligomers were isolated. Dimers, cis-[Pt(L)2(OH)]2(NO3)2 (L = TMSO, DPSO), and cis-[Pt(EMSO)2(OH)]2SO4 and possibly a trimer (cis-[Pt(EMSO)2(OH)]3)2(SO4)3 were characterized. The compounds were studied by infrared spectroscopy and by 1H nmr.

Enantioselective Recognition of Chiral Guests by the Water-Soluble Chiral Keplerate {Mo132} Spherical Capsule with 30 Inner Lactate Ligands

2019 ◽  
Author(s):  
Nancy Watfa ◽  
Weimin Xuan ◽  
Zoe Sinclair ◽  
Robert Pow ◽  
Yousef Abul-Haija ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chiral Recognition ◽  
Association Constants ◽  
Water Soluble ◽  
Enantioselective Recognition ◽  
H Nmr ◽  
Dosy Nmr ◽  
Spherical Capsule ◽  
Surface Pores ◽  
Guest Chemistry

Investigations of chiral host guest chemistry are important to explore recognition in confined environments. Here, by synthesizing water-soluble chiral porous nanocapsule based on the inorganic metal-oxo Keplerate-type cluster, {Mo<sub>132</sub>} with chiral lactate ligands with the composition [Mo<sub>132</sub>O<sub>372</sub>(H<sub>2</sub>O)<sub>72</sub>(<i>x-</i>Lactate)<sub>30</sub>]<sup>42-</sup> (<i>x</i> = D or L), it was possible to study the interaction with a chiral guest, L/D-carnitine and (<i>R</i>/<i>S</i>)-2-butanol in aqueous solution. The enantioselective recognition was studied by quantitative <sup>1</sup>H NMR and <sup>1</sup>H DOSY NMR which highlighted that the chiral recognition is regulated by two distinct sites. Differences in the association constants (K) of L- and D-carnitine, which, due to their charge, are generally restricted from entering the interior of the host, are observed, indicating that their recognition predominantly occurs at the surface pores of the structure. Conversely, a larger difference in association constants (K<i><sub>S</sub></i>/K<i><sub>R</sub></i> = 3) is observed for recognition within the capsule interior of (<i>R</i>)- and (<i>S</i>)-2-butanol.

Simultaneous Analyses of Hydrazine Molecules and Hydrazinium Ions in Aqueous Solution and Adsorbed on Catalyst Surfaces by Near-infrared Spectroscopy

2019 ◽  
Vol 48 (7) ◽  
pp. 738-741
Author(s):  
Aoi Takano ◽  
Yoshikazu Iseki ◽  
Misaki Yanagi ◽  
Yingtong Bao ◽  
Koichiro Asazawa ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Catalyst Surfaces
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