Detail of "2071-20-7"

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CAS Number:
2071-20-7
Name:
Phosphine,1,1'-methylenebis[1,1-diphenyl-
Superlist Name:
Bis(diphenylphosphino)methane
Molecular Structure:
Formula:
C₂₅H₂₂P₂
Molecular Weight:
384.3897
Synonyms:
Phosphine,methylenebis[diphenyl- (6CI,7CI,8CI,9CI);DPPM;DPPM (phosphine derivative);Methanediylbis[diphenylphosphine];Methylenebis[diphenylphosphine];NSC 147767;Tetraphenylmethylenediphosphine;
EINECS:
218-194-2
Melting Point:
118-119 °C(lit.)
Boiling Point:
497.2 °C at 760 mmHg
Flash Point:
270.2 °C
Solubility:
insoluble in water
Appearance:
White powder or crystalline powder
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
22-24/25-37/39-26 Details

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Photolysis of diorganoditellurides in the presence of tertiary phosphines: Photolysis of diorganoditellurides in the presence of tertiary phosphines. Brown, Douglas H.; Cross, Ronald J.; Millington, Douglas (Chem. Dep., Univ. Glasgow, Glasgow, Scot.). J. Organomet.Several reagents with their cas registry numbers 20727-11-1 and 2071-20-7 are used here. Chem., 125(2), 219-23 (English) 1977. CODEN: JORCAI. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) UV irradn. of R2Te2(R = Et, PhCH2) solns. gives R2Te and Te quant. In the presence of R13P[R13 = Ph2Me, Ph2(CH2PPh2)], the reactions are accelerated via the formation of R13PTe, which decomps. to liberate Te and reform R13P. A rapid (on the NMR time scale) equil. between R13PTe and R13P + Te is established in soln. All the reactions are interpreted in terms of an initiation step involving photochem. cleavage of Te-C bonds. Comparisons with analogous reactions of R2S2 and R2Se2 suggest that element-C bonds are more easily cleaved by UV radiation going down the group, whereas element-element bond cleavage becomes less important. .

A rhodium A-frame complex: crystal structure of bis[bis(diphenylphosphino)methane]dicarbonyl-m-hydroxodirhodium(1+) hexafluorophosphate(1-)×acetone: A rhodium A-frame complex: crystal structure of bis[bis(diphenylphosphino)methane]dicarbonyl-m-hydroxodirhodium(1+) hexafluorophosphate(1-)×acetone. Tucker, Craig A.; Woods, Clifton; Burn, James L. E. (Dep. Chem., North Carolina State Univ., Raleigh, NC 27695-8204, USA). Inorg. Chim. Acta, 126(2), 141-5 (English) 1987. CODEN: ICHAA3. ISSN: 0020-1693. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 75 [Rh2(dppm)2(m-L)(CO)2] PF6 (I, L = 2-aminopyridine, dppm = Ph2PCH2PPh2) was prepd. from [Rh2(dppm)2(m-Cl)(CO)2] PF6 and an alc. KOH soln. of L. [Rh2(dppm)2(m-OH)(CO)2]PF6.Me2CO (II) was obtained by hydrolysis of I in acetone. II is monoclinic, P21/n, with a 10.165(3), b 21.084(4), c 25.85(1 ?, b = 95.69(3)°, Z = 4, d.(exptl.) (295 K) = 1.48, d.(calcd. 630-08-0 and 2071-20-7 are cas registry numbers of chemicals which are used as reagents here.) = 1.51 g cm-3, F(000) = 2348, R = 0.0433, Rw = 0.0462, 6257 obsd. reflections I >3s(I). This mol. is H-bonded to an acetone mol. in the lattice and has a Rh...Rh sepn. of 3.139(1) ?, and a Rh(1)-O(3)-Rh(2) angle of 99.1(1)°. No other unusual structural features were obsd. .