The steric effects of the co-ligands originated from the pi-cloud of the pyridine moiety and from increased aliphatic chain length have been utilized to synthesize two different binding modes of nitrite ion. A red-violet nitrito isomer trans-[NiL2(ONO)2] (1) and a blue-violet nitrito (O,O) isomer cis-[NiL′2(O2N)](NO2)·H2O (2) are obtained by adding L and L′ to the methanolic suspension of K4[Ni(NO2)6]·H2O [L = 2-(aminomethyl)pyridine and L′ = 2-(aminoethyl)pyridine]. No other isomer of complex 1 or 2 is yielded in solution irrespective of the nature of the solvent used or in the solid state. They have been characterized by routine physicochemical studies as well as by X-ray single crystal structure analysis. © 2006 Elsevier B.V. All rights reserved.

T CHATTOPADHYAY

N PODDER

K S BANU

A BANERJEE

M GHOSH

E SURESH

M NETHAJI

D DAS

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Journal of Molecular Structure

The linkage isomers trans-bis[4-(2-aminoethyl)morpholine]dinitronickel (II) (brown, 1a) and trans-bis[4-(2-aminoethyl)morphol- ine]dinitritonickel (II) (blue-violet, 1b) have been synthesized from solution. Complex 1a is the major and thermodynamically con- trolled product, whereas, complex 1b is minor and kinetically controlled product. The X-ray single crystal structure analysis of complex 1a has been performed.

Fulltext

Polyhedron

Linkage isomerism in 4-(2-aminoethyl)morpholine (L) complexes of nickel (II) nitrite: X-ray single crystal structure of trans-[NiL2(NO2)2]

The complexes [NiL3](NO2)2P2H2O (violet, 1) and cis-[NiL2(NO2)2]P0.5H2O (pink, 1b) (Ls1,2-diamino-2-methylpropane) have been synthesized from solution. The X-ray single crystal structure analysis of compound 1b has been carried out, but the presence of a water molecule cannot be detected. Upon heating, complex 1b undergoes dehydration followed by an endothermic phase transition to produce trans- [NiL2(NO2)2] (1d). The violet species (1) also undergoes dehydration upon heating with deamination resulting (1d). q2000 Elsevier Science Ltd All rights reserved.

Cis–trans isomerism in nickel(II)–diamine nitrite: synthesis and single crystal structure of an unusual cis-dinitronickel(II) complex, [NiL2(NO2)2] (L=1,2-diamino-2-methylpropane)

The linkage isomers trans-bis[1-(2-aminoethyl)piperidine]dinitronickel() (brown) 1 and trans-bis[1-(2-aminoethyl)- piperidine]dinitritonickel() (blue) 2 have been synthesized and characterised by X-ray single crystal structure analysis.

Journal of the Chemical Society, Dalton Transactions

First structural characterisation of nitro–nitrito linkage isomers of nickel(II): synthesis and single crystal structures of [NiL2(NO2)2] and [NiL2(ONO)2] [L = 1-(2-aminoethyl)piperidine]

Die steuerliche Betriebsprüfung

Verzögerungsgeld nach § 146 Abs. 2b AO in der Außenprüfung

Estudos Avançados

Trajetória da sustentabilidade: do ambiental ao social, do social ao econômico

Ligand steric effect on the coordination mode of nitrite ion: Syntheses and X-ray single crystal structures of trans-[NiL2(ONO)2] and cis-[NiLâ€²2(O2N)](NO2)Â·H2O [L = 2-(aminomethyl)pyridine and Lâ€² = (2-aminoethyl)pyridine]

Journal	Journal of Molecular Structure
Publisher	-
ISSN	0022-2860