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675202

Sigma-Aldrich

Tetrakis(hexahydro-2H-pyrimido[1,2-a]pyrimidinato)ditungsten(III) dichloride

Synonym(s):

Tetrakis(1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidinate)ditungsten(III) dichloride, Tetrakis(1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidinato)ditungsten(III) dichloride, W2(hpp)4Cl2

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About This Item

Linear Formula:
W2(C7H12N3)4Cl2
CAS Number:
280107-73-5
Molecular Weight:
991.35
MDL number:
MFCD22200483
UNSPSC Code:
12352103
PubChem Substance ID:
329760604
NACRES:
NA.22

form

solid

Quality Level

100

reaction suitability

core: tungsten
reagent type: catalyst

mp

233-235 °C

SMILES string

C12=NCCCN1CCCN2[W-]3([Cl+][W-](N4C5=NCCCN5CCC4)(N6C7=NCCCN7CCC6)[Cl+]3)N8C9=NCCCN9CCC8

InChI

1S/4C7H12N3.2Cl.2W/c4*1-3-8-7-9-4-2-6-10(7)5-1;;;;/h4*1-6H2;;;;/q4*-1;4*+1

InChI key

ULSLYQPHFUUSFQ-UHFFFAOYSA-N

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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F Albert Cotton et al.
Inorganic chemistry, 45(1), 201-213 (2006-01-05)
A far superior synthesis is reported for W(2)(hpp)(4)Cl(2), a key intermediate in the synthesis of the most easily ionized closed-shell molecule W(2)(hpp)(4) (hpp = the anion of the bicyclic guanidine compound 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine). At 200 degrees C, the one-pot reaction of
F Albert Cotton et al.
Journal of the American Chemical Society, 127(31), 10808-10809 (2005-08-04)
A new synthetic path, far superior to either of those previously available, to the W2(hpp)4 molecule (Hhpp = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine) is reported. The reaction of W(CO)6 with Hhpp in o-dichlorobenzene at 200 degrees C produces W2(hpp)4Cl2 in a one-pot reaction in

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