双(η5-2,4-环戊二烯-1-基)镍

Description

bis(η5-2,4-cyclopentadien-1-yl)nickel · CAS 1271-28-9 · C10H10Ni. UNII JR8F745XV5. Melting Point: 340 to 343 °F (NTP, 1992).

Identification

CAS Registry Number	1271-28-9
PubChem CID	62390
Molecular formula	C10H10Ni
IUPAC name	bis(cyclopenta-1,3-diene);nickel(2+)
UNII (FDA)	JR8F745XV5

Computed Descriptors

Molecular Weight	188.88
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	188.013592
Monoisotopic Mass	188.013592
Topological Polar Surface Area	0
Heavy Atom Count	11
Formal Charge	0
Complexity	11.6

Physical & Chemical Properties

Melting Point	340 to 343 °F (NTP, 1992)

Physical description & handling notes

• Nickelocene is a dark liquid in an 8-10% solution in toluene. Insoluble in water. (NTP, 1992)
• Dark liquid in an 8-10% solution in toluene; [CAMEO] Dark green crystals; [Hawley]
• 39 °F (8-10% solution in toluene) (NTP, 1992)
• 39 °F (8-10% solution in toluene)
• Insoluble (<1 mg/ml at 75 °F) (NTP, 1992)

GHS Hazard Classification

Reported hazard statements	H228 (91.7%), H302 (97.9%), H317 (97.9%), H350 (95.8%)

Documented Uses

• Used as a catalyst and complexing agent; [Hawley]
• Also known as bis(cyclopentadienyl)nickel or NiCp2, this bright green paramagnetic solid is found abundantly in nature in laterite ore minerals, such as limonite, garnierite, and pentlandite. Nickel has a biological role and is found in certain enzymes, including urease, hydrogenase, methylcoenzyme M reductase, and carbon monoxide dehydrogenase.
• Nickel is absorbed mainly through the lungs and gastrointestinal tract. Once in the body it enters the bloodstream, where it binds to albumin, L-histidine, and _2-macroglobulin. Nickel tends to accumulate in the lungs, thyroid, kidney, heart, and liver. Absorbed nickel is excreted in the urine, wherease unabsorbed nickel is excreted in the faeces. (L41)

Synonyms

Nickelocene; 1271-28-9; Nikelocen [Czech]; Nikelocen; Bis(eta5-2,4-cyclopentadien-1-yl)nickel; Nickel biscyclopentadiene; CCRIS 430; Bis(cyclopentadienyl)nickel(II); Di-pi-cyclopentadienylnickel; EINECS 215-039-0; JR8F745XV5; Bis(cyclopentadienyl)nickel; Nickel, compd with pi-cyclopentadienyl (1:2); BIS(CYCLOPENTADIENYL) NICKEL(II); Dipicyclopentadienylnickel; RefChem:854087

Frequently Asked Questions

What are the CAS number and molecular formula of bis(η5-2,4-cyclopentadien-1-yl)nickel?

CAS 1271-28-9; molecular formula C10H10Ni; molecular weight — g/mol.

What other names is bis(η5-2,4-cyclopentadien-1-yl)nickel known by?

Nickelocene, 1271-28-9, Nikelocen [Czech], Nikelocen, Bis(eta5-2,4-cyclopentadien-1-yl)nickel, Nickel biscyclopentadiene.

Is bis(η5-2,4-cyclopentadien-1-yl)nickel classified as hazardous?

Hazard statements reported: H228, H302, H317, H350.

What are the key physical properties of bis(η5-2,4-cyclopentadien-1-yl)nickel?

Melting Point: 340 to 343 °F (NTP, 1992).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.