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Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

3.2K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
3.2K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

4.6K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
4.6K
Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

356
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
356
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

25.7K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
25.7K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview

3.8K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.8K
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

3.0K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents

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Trichloro(Dinitrogen)Platinate(II).

Gilian T Thomas1, Sofia Donnecke1, Irina Paci1

  • 1Department of Chemistry, University of Victoria, PO Box 1700 STN CSC, Victoria, British, Columbia, V8W 2Y2, Canada.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 30, 2020
PubMed
Summary
This summary is machine-generated.

Researchers have identified a novel platinum-dinitrogen complex, [PtCl3(N2)]−, using mass spectrometry. This groundbreaking discovery opens new avenues for organometallic chemistry involving platinum and dinitrogen.

Keywords:
Zeise's saltdinitrogenion-mobility spectrometrymass spectrometryplatinum

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Area of Science:

  • Organometallic Chemistry
  • Inorganic Chemistry
  • Mass Spectrometry

Background:

  • Zeise's salt, [PtCl3(H2C=CH2)]−, is the oldest known organometallic complex.
  • Dinitrogen complexes of platinum and palladium are currently unknown.

Purpose of the Study:

  • To investigate the possibility of forming dinitrogen complexes with platinum.
  • To characterize the platinum-dinitrogen species generated in solution.

Main Methods:

  • Electrospray ionization mass spectrometry (ESI-MS) of K2[PtCl4] solutions.
  • Ion-mobility spectrometry and MS/MS experiments for ion identification.
  • Computational analysis of platinum-dinitrogen bond strength and N-N bond length.

Main Results:

  • Strong ions corresponding to [PtCl3(N2)]− were generated and detected.
  • The identity of [PtCl3(N2)]− was confirmed and distinguished from isobaric species like [PtCl3(C2H4)]− and [PtCl3(CO)]−.
  • Computational analysis revealed a gas-phase platinum-dinitrogen bond strength of 116 kJ mol−1, with a weakened N-N bond.

Conclusions:

  • The formation and characterization of the platinum-dinitrogen complex [PtCl3(N2)]− represent a significant advancement.
  • This finding challenges the previous understanding of dinitrogen coordination chemistry in platinum and palladium.
  • The study provides crucial insights into the bonding and stability of platinum-dinitrogen interactions.