204218
铑
powder, 99.95% trace metals basis
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关于此项目
经验公式（希尔记法）:
Rh
化学文摘社编号:
分子量:
102.91
NACRES:
NA.23
PubChem Substance ID:
UNSPSC Code:
12141738
EC Number:
231-125-0
MDL number:
InChI key
MHOVAHRLVXNVSD-UHFFFAOYSA-N
InChI
1S/Rh
SMILES string
[Rh]
assay
99.95% trace metals basis
form
powder
resistivity
4.33 μΩ-cm, 20°C
bp
3727 °C (lit.)
mp
1966 °C (lit.)
density
12.41 g/cm3 (lit.)
Quality Level
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General description
铑是铂族中最稀有的金属之一，在地壳中发现的数量非常少（十亿分之二）。铑的化学性质与它不寻常的基态价电子构型有关，在基态价电子构型中，它最外层的s轨道上只有一个电子。这种电子构型对其催化能力具有重要意义，这使得铑在汽车催化转化器中非常有用。同时，金属铑是一种贵金属，这意味着它具有出色的抗氧化性。
铑的粉末形式是银灰色的，不仅用于汽车工业，还用于化学合成和粉末冶金等其他领域。铑比铂和钯更硬，熔化温度更高，这使它成为合金中有用的硬化元素。此外，它很受欢迎的涂层珠宝和其他物品，因为它提供了一个闪亮的保护层，不容易磨损。
铑的粉末形式是银灰色的，不仅用于汽车工业，还用于化学合成和粉末冶金等其他领域。铑比铂和钯更硬，熔化温度更高，这使它成为合金中有用的硬化元素。此外，它很受欢迎的涂层珠宝和其他物品，因为它提供了一个闪亮的保护层，不容易磨损。
Application
铑可用于以下应用：
- 活性炭负载铑（Rh/C）可作为高效的氧还原反应催化剂用于制造微生物燃料电池。
- 用作芳香腈的氢化硅烷化反应生成N, N-二硅烷胺的催化剂。
- 用于制备铑铱合金。
存储类别
4.1B - Flammable solid hazardous materials
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type P3 (EN 143) respirator cartridges
法规信息
新产品
此项目有
Simon Duttwyler et al.
Science (New York, N.Y.), 339(6120), 678-682 (2013-02-09)
Piperidines are prevalent in natural products and pharmaceutical agents and are important synthetic targets for drug discovery and development. We report on a methodology that provides highly substituted piperidine derivatives with regiochemistry selectively tunable by varying the strength of acid
Stepan Chuprakov et al.
Journal of the American Chemical Society, 135(12), 4652-4655 (2013-03-13)
Readily available 1-mesyl-1,2,3-triazoles are efficiently converted into a variety of imidazolones and thiazoles by Rh(II)-catalyzed denitrogenative reactions with isocyanates and isothiocyanates, respectively. The proposed triazole-diazoimine equilibrium results in the formation of highly reactive azavinyl metal-carbenes, which react with heterocumulenes causing
P Andrew Evans et al.
Organic letters, 15(8), 1798-1801 (2013-04-02)
A concise and highly convergent three-step total synthesis of the lactarane natural product, pyrovellerolactone, is described. The key step involves a regio- and diastereoselective rhodium-catalyzed [(3 + 2) + 2] carbocyclization of an alkenylidenecyclopropane with a 4-hydroxybut-2-ynoate followed by an
Juliane Keilitz et al.
Organic letters, 15(5), 1148-1151 (2013-02-21)
A new enantioselective rhodium-catalyzed domino reaction is described that gives access to fused heterocycles by desymmetrization of alkyne-tethered cyclohexadienones. Two new C-C bonds and two stereocenters are formed in one step with good enantioselectivity. In contrast to prior reports, it
Xian-Ying Shi et al.
Organic letters, 15(7), 1476-1479 (2013-03-09)
A novel rhodium(III)-catalyzed direct functionalization of the ortho-C-H bond of aromatic ketone derivatives and an intramolecular cyclization sequence produced indene derivatives in moderate to good yields. This cascade cyclization involves a conjugate addition of α,β-unsaturated ketone and subsequent aldol condensation.
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