In:
Zeitschrift für anorganische und allgemeine Chemie, Wiley
Abstract:
Zerovalent chromium nanoparticles (2.2±0.2 nm in size) are prepared in the liquid phase (THF) by reduction of CrCl 2 with lithium naphthalenide ([LiNaph]). The deep black Cr(0) nanoparticle suspensions in THF are colloidally and chemically highly stable. On the other hand, the Cr(0) nanoparticles are highly reactive, e. g., when in contact to O 2 , H 2 O, or other oxidizing agents. To probe the reactivity of the Cr(0) nanoparticles in the liquid phase near room temperature (50–80 °C), they are reacted with different coordinatively demanding, N−H, S−H or O−H acidic reactants. This includes the amines 2,2′‐dipyridylamine (HDPA), 2‐(1 H ‐imidazol‐2‐yl)pyridine (HImPy) and carbazole (HCbz), the thiol 2‐mercaptopyridine (HMPy), and benzoic acid (HBz) as a carboxylate. As a result, the five novel compounds [Cr(DPA) 3 ], [Cr(ImPy) 3 ] ⋅ HImPy, [Cr(MPy) 3 ] ⋅ 0.5 T ol (Tol: toluene), [Na 2 Cr(Cbz) 4 (THF) 3 ], and [Cr 2 (Bz) 4 (THF) 2 ] are obtained. [Cr(DPA) 3 ] and [Cr(ImPy) 3 ] ⋅ HImPy show Cr(III) coordinated by nitrogen only; [Cr(MPy) 3 ] ⋅ 0.5 Tol shows a coordination of Cr(III) by both N and S atoms. [Na 2 Cr(Cbz) 4 (THF) 3 ] and [Cr 2 (Bz) 4 (THF) 2 ] contain Cr(II) and exhibit an infinite chain‐like structure and pairs of chromium atoms with fourfold binding.
Type of Medium:
Online Resource
ISSN:
0044-2313
,
1521-3749
DOI:
10.1002/zaac.202300137
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
201094-X
detail.hit.zdb_id:
1481139-X
Permalink