scholarly journals Multidimensional Transition Metal Complexes Based on 3-Amino-1H-1,2,4-triazole-5-carboxylic Acid: From Discrete Mononuclear Complexes to Layered Materials

Molecules ◽  
2015 ◽  
Vol 20 (7) ◽  
pp. 12341-12363 ◽  
Author(s):  
Bing Liu ◽  
José Fernandes ◽  
João Tomé ◽  
Filipe Paz ◽  
Luís Cunha-Silva
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Layered Materials ◽  
Mononuclear Complexes

Structural analysis of the coordination of dinitrogen to transition metal complexes

2015 ◽  
Vol 71 (3) ◽  
pp. 369-386 ◽  
Author(s):  
Benjamin Peigné ◽  
Gabriel Aullón
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Electronic Configuration ◽  
Nitrogen Molecule ◽  
Geometrical Parameters ◽  
Binuclear Complexes ◽  
Mononuclear Complexes ◽  
Structural Database ◽  
Metal Properties

Transition-metal complexes show a wide variety of coordination modes for the nitrogen molecule. A structural database study has been undertaken for dinitrogen complexes, and geometrical parameters around theLnM—N2unit are retrieved from the Cambridge Structural Database. These data were classified in families of compounds, according to metal properties, to determine the degree of lengthening for the dinitrogen bonding. The importance of the nature of the metal center, such as coordination number and electronic configuration, is reported. Our study reveals poor activation by coordination of dinitrogen in mononuclear complexes, always havingend-oncoordination. However, partial weakening of nitrogen–nitrogen bonding is found forend-onbinuclear complexes, whereasside-oncomplexes can be completely activated.

scholarly journals Crystal structures and Hirshfeld surface analysis of transition-metal complexes of 1,3-azolecarboxylic acids

2019 ◽  
Vol 75 (9) ◽  
pp. 1319-1326
Author(s):  
Natthaya Meundaeng ◽  
Timothy John Prior ◽  
Apinpus Rujiwatra
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Surface Analysis ◽  
Transition Metal Complexes ◽  
Self Assembly ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Single Crystal Structures

The crystal structures of five new transition-metal complexes synthesized using thiazole-2-carboxylic acid (2-Htza), imidazole-2-carboxylic acid (2-H2ima) or 1,3-oxazole-4-carboxylic acid (4-Hoxa), namely diaquabis(thiazole-2-carboxylato-κ2 N,O)cobalt(II), [Co(C4H2NO2S)2(H2O)2], 1, diaquabis(thiazole-2-carboxylato-κ2 N,O)nickel(II), [Ni(C4H2NO2S)2(H2O)2], 2, diaquabis(thiazole-2-carboxylato-κ2 N,O)cadmium(II), [Cd(C4H2NO2S)2(H2O)2], 3, diaquabis(1H-imidazole-2-carboxylato-κ2 N 3,O)cobalt(II), [Co(C4H2N2O2)2(H2O)2], 4, and diaquabis(1,3-oxazole-4-carboxylato-κ2 N,O 4)cobalt(II), [Co(C4H2NO3)2(H2O)2], 5, are reported. The influence of the nature of the heteroatom and the position of the carboxyl group in relation to the heteroatom on the self-assembly process are discussed based upon Hirshfeld surface analysis and used to explain the observed differences in the single-crystal structures and the supramolecular frameworks and topologies of complexes 1–5.

Toward development of environmentally benign processes catalyzed by transition-metal complexes

2002 ◽  
Vol 74 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Akio Yamamoto
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Cleavage ◽  
Environmentally Benign ◽  
Aldehydes And Ketones ◽  
Catalytic Processes

On the basis of fundamental studies on the carbon­oxygen bond cleavage of various carboxylic acid derivatives, novel, atom-efficient, and environmentally benign catalytic processes to convert them into acids, aldehydes, and ketones have been developed.

Übergangsmetallkomplexe mit Schwefelliganden, IX. Templat-Synthese und Reaktionen der Eisen(II)-Komplexe [Fe(CO)2(C6H4S2–X–S2C6H4)] mit kurz- und langkettig verbrückten o-Benzoldithiolat-Liganden, X = (CH2)n, n = 1,3–8,12; X = CH2COCH2; Synthese der freien Liganden / Transition Metal Complexes with Sulfur Ligands, IX* Template Synthesis and Reactions of the Iron(II) Complexes [Fe(CO)2(C6H4S2–X–S2C6H4)] with o-Benzenedithiolate Ligands. Bridged by Short as well as Long Chains (X = (CH2)n, n = 1,3–8,12; X = CH2COCH2); Synthesis of the Free Ligands

1984 ◽  
Vol 39 (9) ◽  
pp. 1268-1275 ◽  
Author(s):  
Dieter Sellmann ◽  
Wolfgang Reißer
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Template Synthesis ◽  
Substitution Rate ◽  
Mononuclear Complexes ◽  
Hydrolysis Of ◽  
Long Chain ◽  
Long Chains

Alkylation of [Fe(CO)2(S2C6H4)2]2- by Br(CH2)nBr (n = 1,3-6) or CICH2COCH2Cl yields [Fe(CO)2(C6H4S2-(CH2)n-S2C6H4)] and [Fe(CO)2(C6H4S2-CH2COCH2-S2C6H4)]. respectively. With long-chain dibromoalkanes (n = 7,8,12) the oligonuclear complexes [Fe(CO)2(C6H4S2 - (CH2)n - S2C6H4)]x also form; in these cases the mononuclear complexes can be obtained by dilution methods. Growing length of the bridge between the thioether donor atoms favours the loss of CO and formation of [Fe(CO)(C6H4S2-(CH2)3-S2C6Η4)]2 and [Fe(C6H4S2 - (CH2)n-S2C6H4)]x (n = 1,4-8,12). respectively; substitution rate of CO by PMe3 is increased as well. Hydrolysis of the Fe(CO)2 complexes by HCl gives the free tetradentate thioetherthiol ligands HSC6H4S - (CH2)n - S2C6H4SH.

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