:Triazabicyclodecene

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 470613105

| Reference = [http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/345571 1,5,7-Triazabicyclo[4.4.0]dec-5-ene] at Sigma-Aldrich

| ImageFileL1 = Triazabicyclodecene.svg

| ImageFileR1 = TBD 2.png

| PIN = 1,3,4,6,7,8-Hexahydro-2H-pyrimido[1,2-a]pyrimidine

| OtherNames = 1,5,7-Triazabicyclo[4.4.0]dec-5-ene
TBD
Hexahydropyrimidopyrimidine
hpp

|Section1={{Chembox Identifiers

| ChEBI = 94622

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 72164

| EINECS = 227-367-1

| InChI = 1/C7H13N3/c1-3-8-7-9-4-2-6-10(7)5-1/h1-6H2,(H,8,9)

| InChIKey = FVKFHMNJTHKMRX-UHFFFAOYAP

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/C7H13N3/c1-3-8-7-9-4-2-6-10(7)5-1/h1-6H2,(H,8,9)

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = FVKFHMNJTHKMRX-UHFFFAOYSA-N

| CASNo_Ref = {{cascite|correct|CAS}}| CASNo = 5807-14-7

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = KAF7GN82TM

| PubChem = 79873

| SMILES = N\2=C1/NCCCN1CCC/2

}}

|Section2={{Chembox Properties

| Formula =C₇H₁₃N₃

| MolarMass =139.20 g/mol

| Appearance =

| Density =

| MeltingPtC = 125 to 130

| MeltingPt_notes =

| BoilingPt =

| Solubility =

| pKa = 15.2 ± 1.0{{cite journal | last1 = Kaupmees | first1 = K. | last2 = Trummal | first2 = A. | last3 = Leito | first3 = I. | title = Basicities of Strong Bases in Water: A Computational Study | journal = Croat. Chem. Acta | year = 2014 | volume = 87 | issue = 4 | pages = 385–395 | doi = 10.5562/cca2472 | doi-access = free }} (pK_a of conjugate acid in water); 26.03{{cite journal | last1 = Kaljurand | first1 = I. | last2 = Kütt | first2 = A. | last3 = Sooväli | first3 = L. | last4 = Rodima | first4 = T. | last5 = Mäemets | first5 = V. | last6 = Leito | first6 = I. | last7 = Koppel | first7 = I. A. | title = Extension of the Self-Consistent Spectrophotometric Basicity Scale in Acetonitrile to a Full Span of 28 pK_a Units: Unification of Different Basicity Scales | journal = J. Org. Chem. | year = 2005 | volume = 70 | issue = 3 | pages = 1019–1028 | doi = 10.1021/jo048252w | pmid=15675863}} (pK_a of conjugate acid in acetonitrile)

}}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt =

| GHSPictograms = {{GHS05}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|314}}

| PPhrases = {{P-phrases|260|264|280|301+330+331|303+361+353|304+340|305+351+338|310|321|363|405|501}}

}}

}}

Triazabicyclodecene (1,5,7-triazabicyclo[4.4.0]dec-5-ene or TBD) is an organic compound consisting of a bicyclic guanidine. For a charge-neutral compound, it is a relatively strong base that is effective for a variety of organic transformations. TBD is colorless solid that is soluble in a variety of solvents.{{cite encyclopedia|first1=Adam|last1=Huczynski|first2=Bogumil|last2=Brzezinski|title=1,5,7-Triazabicyclo[4.4.0]dec-5-ene|encyclopedia=e-EROS Encyclopedia of Reagents for Organic Synthesis|publisher=John Wiley & Sons|date=2008|doi=10.1002/047084289X.rn00786|isbn=978-0-471-93623-7}}