3676-91-3

Basic information

• Product Name: TETRAMETHYLBIPHOSPHINE
• Synonyms: TETRAMETHYLBIPHOSPHINE;Diphosphine, tetramethyl-;Tetramethyldiphosphine;dimethylphosphanyl(dimethyl)phosphane;dimethylphosphino(dimethyl)phosphane
• CAS NO: 3676-91-3
• Molecular Formula: C₄H₁₂P₂
• Molecular Weight: 122.09
• EINECS: 222-949-1
• Mol File: 3676-91-3.mol
• Article Data: 13

Chemical Properties

• Melting Point: -2.1°C
• Boiling Point: 141°C
• Flash Point: 24.9 °C
• Appearance: /liquid
• Density: g/cm³
• Vapor Pressure: 16.4mmHg at 25°C
• CAS DataBase Reference: TETRAMETHYLBIPHOSPHINE(CAS DataBase Reference)
• NIST Chemistry Reference: TETRAMETHYLBIPHOSPHINE(3676-91-3)
• EPA Substance Registry System: TETRAMETHYLBIPHOSPHINE(3676-91-3)

Safety Data

• Hazardous Substances Data: 3676-91-3(Hazardous Substances Data)

Usage

Synthesis Reference(s)

Journal of the American Chemical Society, 83, p. 2226, 1961 DOI: 10.1021/ja01471a003

InChI:InChI=1/C4H12P2/c1-5(2)6(3)4/h1-4H3

Upstream product

• 676-59-5 dimethylphosphane 
• 683-84-1 (dimethylamino)dimethylphosphine 
• 100-39-0 benzyl bromide 
• 106-95-6 allyl bromide 
• 3676-97-9 tetramethyl-diphosphine disulphide 
• 676-83-5 methyldichlorophosphane 
• 52713-97-0 2-methyl-5-phenyl-2H-1,2,4,3-triazaphosphole 
• 811-62-1 chlorodimethylphosphine 
• 16530-79-3 tris(dimethylamido)titanium(IV) chloride 
• 21743-25-9 lithium dimethylphosphide 
• 6607-37-0 titanium tris(diethylamido)chloride 
• 77-78-1 dimethyl sulfate 
• 684-16-2 Hexafluoroacetone 
• 26464-99-3 dimethyl(trimethylsilyl)phosphine 

Downstream Products

• 993-11-3 tetramethylphosphonium iodide 
• 64065-08-3 dmpm 
• 154781-52-9 2-(N,N-dimethylamino)dimethylphosphinoethane 
• 250709-79-6 2-(phenylthio)dimethylphosphinoethane 
• 77659-49-5 Tricarbonyl(tetramethyldiphosphan)nickel 
• 77674-07-8 Ni(CO)2(P₂(CH₃)4)2Ni(CO)2 
• 64116-05-8 {Ni₂(CO)6C₄H₁₂P₂} 
• 5075-61-6 dimethyl(pentafluorophenyl)phosphine 
• 20626-85-1 Dimethyl(diphenylamino)phosphin 
• 20626-86-2 Phenyldimethylphosphinoselenoit 
• 13888-96-5 1,2-Bis-dimethylphosphino-3,3,4,4-tetrafluor-cyclobuten 
• 39654-12-1 1,1-Dimethyl-2,2-diphenyl-diphosphane 
• 811-62-1 chlorodimethylphosphine 
• 35449-60-6 dimethyl methylthiophosphinite 

Relevant articles and documents

Process for preparing (metal) alkylphosphonites I

The invention relates to a process for the preparation of (metal) salts of alkylphosphonous acids, which comprises reacting elemental yellow phosphorus with halogen-free alkylating agents in the presence of at least one base. The invention also relates to the use of the (metal) salts of alkylphosphonous acids prepared by this process.

Lewis acidic titanium species: the synthesis, structure, bonding and molecular modelling considerations of the complexes Ti(NR2)3Cl (R = Me, Et)

Reaction of simple amides with TiCl4 affords mixed amido-chloride species Ti(NR2)4-nCln.The trisamide-chloride species Ti(NR2)3Cl can be prepared directly employing three equivalents of amide or by reaction Ti(NR2)4 with TiCl4.The compound Ti(NMe2)3Cl, 1, crystallizes in the trigonal space group , with a = 11.525(5), c = 14.939(3) Angstroem, Z = 6, and V = 1718(1) Angstroem3.The compound Ti(NEt2)3Cl, 2, crystallizes in the monoclinic space group P21/c, with a = 8.385(2) Angstroem, b = 15.958(2) Angstroem, c = 14.230(4) Angstroem, β = 107.79(1) deg, Z = 4, and V = 1813(1) Angstroem3.The geometry of the Ti coordination sphere in these complexes is best described as pseudo-tetrahedral.The structural data are consistent with Ti-N multiple bonding.Preliminary results of EHMO calculations are consistent with d?-p? Ti-N bonding.Attempts to replace the halides with phosphides (LiPR2, R = Me, Et, Ph) led not to the Ti(IV) phosphido species, but rather to redox chemistry yielding Ti(III) amides and P2R4.The barrier to rotation about the Ti-N bonds has been considered.Variable temperature 1H NMR studies reveal that the barrier is small.Extended Hueckel total energy minimization calculations have been performed.In addition, MMX calculations of the barrier Ti-N rotation are reported.The results of these calculations imply that the rotational barrier is dominated by steric effects. Key words: titanium amides, structures, Ti-N bonding.