1920-90-7 Usage
General Description
Tetra-n-butyllead is a chemical compound classified as an organolead compound, consisting of a tetrahedral lead(IV) center bonded to four n-butyl groups. It is a highly toxic and harmful substance with potential environmental and health risks. Tetra-n-butyllead has historically been used as a gasoline additive to improve engine performance, but it has been largely phased out due to its toxic nature and environmental impact. Exposure to this compound can lead to serious health effects, including neurological damage, organ failure, and other systemic toxicity. The production and use of tetra-n-butyllead have been regulated and restricted in many countries to minimize its negative impact on human health and the environment.
Check Digit Verification of cas no
The CAS Registry Mumber 1920-90-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,2 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1920-90:
(6*1)+(5*9)+(4*2)+(3*0)+(2*9)+(1*0)=77
77 % 10 = 7
So 1920-90-7 is a valid CAS Registry Number.
InChI:InChI=1/4C4H9.Pb/c4*1-3-4-2;/h4*1,3-4H2,2H3;/rC16H36Pb/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4/h5-16H2,1-4H3
1920-90-7Relevant articles and documents
IR Spectra of n-Bu4M (M = Si, Ge, Sn, Pb), n-BuAuPPh3-d15, and "n-Bu" on a Gold Surface
Kaleta, Ji?í,Bednárová, Lucie,?í?ková, Martina,Wen, Jin,Kaletová, Eva,Michl, Josef
, p. 4619 - 4625 (2017/07/11)
Observed and DFT-calculated IR spectra of n-Bu4M (M = Si, Ge, Sn, Pb), (CH3CH2CH213CD2)4Sn, and n-BuAuPPh3-d15 are reported and assigned. The asymmetric CH stretching vibration of the CH2 group adjacent to the metal atom appears as a distinct shoulder at ～2934 cm-1, whereas for other CH2 groups it is located at ～2922 cm-1. The characteristic peak at ～2899 cm-1 is attributed to an overtone of a symmetric CH2 bend at ～1445 cm-1. In n-BuAuPPh3-d15, the CH stretching vibrations of the butyl group are shifted to lower frequencies by ～10 cm-1, and two possible rationalizations are offered.
