Abstract: There is provided a silacyclohexane compound and method of making same. The silacyclohexane compound has the following formula (1): ##STR1## wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a mono- or di-fluoroalkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8, ##STR2## denotes a trans-1-sila-1,4-cyclohexylene or a trans-4-sila-1,4-cyclohexylene group having silicon at positions 1 or 4 with substitutional group(s) of H, F, C1 or CH.sub.3 ; n denotes 0 or 1; L.sub.1 and L.sub.2 independently denote H.F, C1, CN or CH.sub.3 ; L.sub.3 denotes F; m denotes O, 1 or 2; and X denotes H, CN, F, C1, CF.sub.3, CC1F.sub.2, CHFC1, OCC1F.sub.2, OCHFC1, OCHF.sub.2, OCF.sub.3, R or OR group.

Abstract: A silacyclohexane carbaldehyde compound of the following formula (I) ##STR1## wherein Ar represents a phenyl group or a tolyl group, and R represents a phenyl group, a tolyl group, a linear alkyl group, a mono or difluoroalkyl group, a branched alkyl group, an alkoxyalkyl group or an alkenyl group. Processes for preparing a silacyclohexane-based liquid crystal compound of the following formula (II) or (III) from the silacyclohexane carbaldehyde are also described ##STR2## wherein X represents CN, F, Cl, CF.sub.3, CClF.sub.2, CHClF, OCF.sub.3, OCClF.sub.2, OCHF.sub.2, OCHClF, (O).sub.m CT=CX.sub.1 X.sub.2, O(CH.sub.2).sub.r (CF.sub.2).sub.s X.sub.3, R or OR wherein m is a value of 0 or 1, T and X.sub.1 independently represent H, F or Cl, X.sub.2 represents F or Cl, r and s are, respectively, a value of 0, 1 or 2 provided that r+s=2, 3 or 4, X.sub.

Abstract: Processes for selectively preparing silacyclohexane compounds of a trans form from diarylsilacyclohexane compounds of the general formula ##STR1## wherein Ar and Ar' independently represent a phenyl group or a tolyl group, and Q represents a group of the type indicated below ##STR2## The diarylsilacyclohexanes are converted to dihalosilacyclohexanes and then to hydrohalosilacyclohexanes directly or via dialkoxylation and/or reduction step. The hydrohalosilacyclohexane are finally reacted with organometallic compounds having a group, Q', of the type indicated below ##STR3## to obtain silacyclohexane compounds of the general formula ##STR4## wherein Q' and Q have, respectively, the groups indicated hereinabove.

Abstract: There is provides a silacyclohexane compound and method of making same. The silacyclohexane compound has the following formula (1): ##STR1## wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, a mono- or di-fluoroalkyl group with a carbon number of 1-10, or an alkenyl group with a carbon number of 2-8, and ##STR2## denotes a trans-1-sila-1,4-cyclohexylene or a trans-4-sila-1,4-cyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH.sub.3, X denotes H, CN, F, Cl, CF.sub.3, OCF.sub.3, CF.sub.2 Cl, CHFCl, OCHF.sub.2, OCF.sub.2 Cl, OCHFCl, R or OR group, Z denotes F, and i denotes 0, 1 or 2.

Abstract: A cyclohexane carbaldehyde compound of the following formula (I) ##STR1## wherein Ar represents a phenyl group or a tolyl group, and R represents a phenyl group, a tolyl group, a linear alkyl group, a mono or difiuoroalkyl group, a branched alkyl group or an alkoxyalkyl group. Processes for preparing a silacyclohexane-based liquid crystal compound of the following formula (II) or (III) from the cyclohexane carbaldehyde are also described ##STR2## wherein R represents a phenyl group, a tolyl group, a linear alkyl group, a mono or difiuoroalkyl group, a branched alkyl group or an alkoxyalkyl group, X represents R or OR, in which R has the same meaning as defined above, CN, F, C1, Br, CF.sub.3, OCF.sub.3, OCHFCL, OCF.sub.2 Cl, CF.sub.2 Cl, (O).sub.m CY.sub.1 =CX.sub.1 X.sub.2, O(CH.sub.2).sub.r (CF.sub.2).sub.s X.sub.3, wherein m is a value of 0 or 1, Y.sub.1 and X.sub.1 independently represent H, F or Cl, X.sub.

Abstract: A process for preparing silacyclohexane-based liquid crystal compounds of the formula which comprises reacting ketone compounds of the following general formula ##STR1## Ar represents a phenyl or tolyl group, and R represents Ar, a substituted or unsubstituted alkyl group, with an organometal reagent such as a Grignard reagent or an organotitanium, organolithium or organozinc compound, followed by dehydration, oxidation, de-silylation and reduction to obtain silacyclohexane-based liquid crystal compounds of the type mentioned below. ##STR2## wherein Y is halogen and i is a value of 0, 1, 2 or 3, and A represents a substituted phenyl group or tolyl group or a halogen or functional group such as CN, Cl, Br, OCF.sub.3, OCHF.sub.2 etc.

Abstract: A silacyclohexane compound represented by the following general formula (1): ##STR1## wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a mono- or di-fluoroalkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8, and at least one of ##STR2## denotes a trans-1-sila-1,4-cyclohexylene or a trans-4-sila-1,4-cyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH.sub.3 and the other is a trans-1,4-cyclohexylene group, X denotes a CN, F, F, Cl, CF.sub.3, OCF.sub.3, OCHF.sub.2, OCHFCl, CF.sub.2 Cl, OCF.sub.2 Cl, R or OR group, Z.sub.1 denotes H, F or Cl, and Z.sub.2 denotes H or F.

Abstract: A silacyclohexane compound represented by the following general formula (I). ##STR1## In this formula, R denotes a linear-chain alkyl group with a carbon number of 1-10, a mono- or di-fluoroalkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8. ##STR2## denotes a trans-1-silacyclohexylene or trans-4-silacyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH.sub.3. X denotes a CN, F, Cl, CF.sub.3, CF.sub.2 Cl, CHFCl, OCF.sub.3, OCHF.sub.2, OCF.sub.2 Cl, OCHFCl, R or OR group. Y denotes H or F. Z denotes H or F.

Abstract: A silacyclohexane compound represented by the following general formula (I). ##STR1## R denotes hydrogen, a linear-chain alkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8. For ##STR2## at least one of these is trans-1-silacyclohexylene or trans-4-silacyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH.sub.3, and the other denotes trans-1,4-cyclohexylene group. X denotes a CN, F, Cl, CF.sub.3, CF.sub.2 Cl, CHFCl, OCF.sub.3, OCHF.sub.2, OCF.sub.2 Cl, OCHFCl, R or OR group.

Abstract: An electroluminescent device of the dispersion type exhibiting high brightness of electroluminescence and having excellent heat resistance and flexibility, and usable as a backlighting unit for liquid crystal displays and as a plane light-emitting body, can be prepared by using, as the matrix material of the particulate electroluminescent material, a specific cyanoalkyl group-containing organopolysiloxane represented by the average unit formula R.sup.1.sub.a R.sup.2.sub.b SiO.sub.(4-a-b)/2, in which R.sup.1 is a cyanoalkyl group having 3 to 5 carbon atoms, R.sup.2 is a monovalent hydrocarbon group, a is 0.8 to 1.8 and b is 0 to 1.0 with the proviso that a+b is 1.1 to 1.98.