98-12-4 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 98-12-4 differently. You can refer to the following data:
1. CLEAR COLOURLESS LIQUID
2. Cyclohexyl trichlorosilane is a colorless to
pale yellow liquid.
General Description
A colorless to pale yellow liquid with a pungent odor. Flash point 185°F. Corrosive to metals and tissue.
Reactivity Profile
Chlorosilanes, such as Cyclohexyltrichlorosilane, are compounds in which silicon is bonded to from one to four chlorine atoms with other bonds to hydrogen and/or alkyl groups. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous H2. They can serve as chlorination agents. Chlorosilanes react vigorously with both organic and inorganic acids and with bases to generate toxic or flammable gases.
Health Hazard
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Contact with molten substance may cause severe burns to skin and eyes. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Safety Profile
A highly toxic and
corrosive material. When heated to
decomposition it emits toxic fumes of Cl-.
See also CHLOROSILANES.
Potential Exposure
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explo-
sions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. Chlorosilanes react vigor-
ously with bases and both organic and inorganic acids gen-
erating toxic and/or flammable gases. Chlorosilanes react
with water, moist air, or steam to produce heat and toxic,
corrosive fumes of hydrogen chloride. They may also pro-
duce flammable gaseous hydrogen. Attacks metals in the
presence of moisture.
Shipping
UN1763 Cyclohexyltrichlorosilane, Hazard
class: 8; Labels: 8-Corrosive material.
Check Digit Verification of cas no
The CAS Registry Mumber 98-12-4 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 98-12:
(4*9)+(3*8)+(2*1)+(1*2)=64
64 % 10 = 4
So 98-12-4 is a valid CAS Registry Number.
InChI:InChI=1/C6H11Cl3Si/c7-10(8,9)6-4-2-1-3-5-6/h6H,1-5H2
98-12-4Relevant articles and documents
Burkhard,Krieble
, p. 43 (1953)
Thermal hydrosilylation of olefin with hydrosilane. Preparative and mechanistic aspects
Jung, Dong Euy,Han, Joon Soo,Yoo, Bok Ryul
experimental part, p. 3687 - 3692 (2011/11/29)
The reaction of trichlorosilane (1a) at 250 °C with cycloalkenes, such as cyclopentene (2a), cyclohexene (2b), cycloheptene (2c), and cyclooctene (2d), gave cycloalkyltrichlorosilanes [CnH2n-1SiCl3: n = 5 (3a), 6 (3b), 7 (3c), 8 (3d)] within 6 h in excellent yields (97-98%), but the similar reactions using methyldichlorosilane (1b) instead of 1a required a longer reaction time of 40 h and afforded cycloalkyl(methyl)dichlorosilanes [CnH2n-1SiMeCl2: n = 5 (3e), 6 (3f), 7 (3g), 8 (3h)] in 88-92% yields with 4-8% recovery of reactant 2. In large (2, 0.29 mol)-scale preparations, the reactions of 2a and 2b with 1a (0.58 mol) under the same condition gave 3a and 3b in 95% and 94% isolated yields, respectively. The relative reactivity of four hydrosilanes [HSiCl3-mMem: m = 0-3] in the reaction with 2a indicates that as the number of chlorine-substituent(s) on the silicon increases the rate of the reaction decreases in the following order: n = 3 > 2 > 1 ? 0. In the reaction with 1a, the relative reactivity of four cycloalkenes (ring size = 5-8) decreases in the following order: 2d > 2a > 2c > 2b. Meanwhile linear alkenes like 1-hexene undergo two reactions of self-isomerization and hydrosilylation with hydrosilane to give a mixture of the three isomers (1-, 2-, and 3-silylated hexanes). In this reaction, the reactivity of the terminal 1-hexene is higher than the internal 2- and 3-hexene. The redistribution of hydrosilane 1 and the polymerization of olefin 2 occurred rarely under the thermal reaction condition.
Hydrosilylation of cyclohexene, 1-methylcyclohexene, and isopropylidenecyclohexane
Yarosh,Zhilitskaya,Yarosh,Albanov,Voronkov
, p. 1895 - 1899 (2007/10/03)
Hydrosilylation of cyclohexene and isopropylidenecyclohexane with chloro(methyl)silanes Me3-n SiHCln (n = 1-3) gives rise to cyclohexyl- and chloro(2-cyclohexylpropyl)methylsilanes. Hydrosilylation of 1-methylcyclohexene with chlorodimethylsilane (n = 1) occurs anomalously and involves double-bond migration to form a mixture of seven compounds: the cis and trans isomers of 2-, 3-, 4-chlorodimethyl(methylcyclohexyl)silanes and chlorodimethyl(cyclohexylmethyl)silane. Chlorodimethylsilane (n = 2) adds to 1-methylcyclohexene to form a mixture of the cis and trans isomers of dichloro(methyl)(2-methylcyclohexyl)silane and dichloro(cyclohexylmethyl) methylsilane. With trichlorosilane (n = 3), no other products than trichloro(cyclohexylmethyl)silane are formed. The hydrosilylation products were reacted with ethynylmagnesium bromide to synthesize the corresponding ethynyl derivatives. 2004 MAIK "Nauka/Interperiodica".
