1,4-Bis(diphenylphosphino)butane

1,4-Bis(diphenylphosphino)butane (dppb) is an organophosphorus compound with the formula (Ph₂PCH₂CH₂)₂. It is less commonly used in coordination chemistry than other diphosphine ligands such as dppe. It is a white solid that is soluble in organic solvents.

Quick facts Names, Identifiers ...

1,4-Bis(diphenylphosphino)butane

Names
Preferred IUPAC name (Butane-1,4-diyl)bis(diphenylphosphane)
Other names dppb, dpb
Identifiers
CAS Number	7688-25-7
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL71648
ChemSpider	74118
ECHA InfoCard	100.028.817
EC Number	231-698-7
PubChem CID	82124
UNII	35HP6LTD2D
CompTox Dashboard (EPA)	DTXSID4064769
InChI InChI=1S/C28H28P2/c1-5-15-25(16-6-1)29(26-17-7-2-8-18-26)23-13-14-24-30(27-19-9-3-10-20-27)28-21-11-4-12-22-28/h1-12,15-22H,13-14,23-24H2 Key: BCJVBDBJSMFBRW-UHFFFAOYSA-N
SMILES C1=CC=C(C=C1)P(CCCCP(C2=CC=CC=C2)C3=CC=CC=C3)C4=CC=CC=C4
Properties
Chemical formula	C28H28P2
Molar mass	426.480 g·mol−1
Melting point	132–136 Â°C (270–277 Â°F; 405–409 K)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335
Precautionary statements	P261, P264, P270, P271, P272, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P333+P313, P337+P313, P362, P363, P391, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 Â°C [77 Â°F], 100 kPa). Infobox references

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