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91-12-3

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91-12-3 Usage

Definition

ChEBI: A cyclic hydrocarbon that consists of two cyclopentane rings connected via a C2C bond between the methylene groups.

Check Digit Verification of cas no

The CAS Registry Mumber 91-12-3 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 91-12:
(4*9)+(3*1)+(2*1)+(1*2)=43
43 % 10 = 3
So 91-12-3 is a valid CAS Registry Number.

91-12-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name fulvalene

1.2 Other means of identification

Product number -
Other names Bicyclopentyliden-2,4,2',4'-tetraene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:91-12-3 SDS

91-12-3Downstream Products

91-12-3Relevant articles and documents

LeVanda et al.

, p. 3181,3186 (1976)

Scherer

, p. 1550 (1963)

The reactions of diazo compounds with lactones. Part 1. Cyclopropanespiro-β-lactones from diketene: Synthesis and reactions

Murphy, Paul V.,O'Sullivan, Timothy J.,Geraghty, Niall W.A.

, p. 2109 - 2119 (2007/10/03)

The cyclopropanespiro-β-lactones 3, 4 and 12 can be prepared by the metal catalysed, or photochemically promoted decomposition reactions of diazocompounds in the presence of diketene. The thermal reactions of these compounds give a variety of products depending on the nature of the spirolactone; these include a furan 9a, 1,4-dicarbonyl compounds 18a-c and 19b, a pyranone 20b, furanones 21a, 21f and 22a and the enol 16. The boron trifluoride promoted reaction of a mixture of 3b and 4b gives a 13-ketoacid. Mechanisms are proposed for the formation of these products. The rearrangment of the cyclopropanespiro-β-lactones to furan-2(5H)-ones and furan-2-(3H)-ones 6-8, 21a, 21f, 22a and 24 is shown to be a general reaction that involves metal catalysis. A mechanism based on formation of a metallocycle by a novel insertion of the metal into the C-O bond of the β-lactone ring is proposed for this rearrangement. This accounts for the observed features of the reaction.

DIRECT IR-SPECTROSCOPIC OBSERVATION OF (1+2)-CYCLOADDITION OF CYCLOPENTADIENYLIDENE TO ETHYLENE IN ARGON MATRIX

Nefedov, Oleg M.,Zuev, Petr S.,Maltsev, Andrey K.,Tomilov, Yuri V.

, p. 763 - 764 (2007/10/02)

Cyclopentadienylidene was generated in argon matrix doped with 2percent C2H4 and the direct reaction of the carbene with C2H4 in matrix, when it was annealing from 12 to 40-45 K, was observed.

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