Esters having the general formula ##STR1## where X is a halogen, the sum of the atomic masses of the halogen atoms on the phenyl ring is at least 90, n is 1-5, Y is an alkyl, ether, ester, aldehyde, ketone, acetal, ketal, cyano, or nitro substituent, m is 0-2, Z is an ester linkage --OCO-- or --CO.sub.2 --, R' is a haloalkyl group containing at least one F atom and containing halogen atoms in place of greater than 60% of the hydrogen atoms of the corresponding unhalogenated alkyl group, with the sum of the atomic masses of the halogen atoms on said R' group being greater than 135 and the compound as a whole containing at least two types of halogen atoms, and p is 1-3, constitute high density flotation fluids and lubricants for inertial instruments such as gyroscopes and accelerometers, and for electrical contacts. Synthetic methods are disclosed for production of such fluids from available starting materials.
酯类化合物具有一般式##STR1##其中X是卤素,苯环上卤素原子的原子质量之和至少为90,n为1-5,Y是烷基,醚,酯,醛,酮,
缩醛,
缩酮,
氰基或硝基取代基,m为0-2,Z是酯键-OCO-或-CO.sub.2-,R'是含有至少一个F原子的卤代烷基,且含有相应未卤代的烷基中60%以上的卤素原子取代氢原子的卤代烷基,其卤素原子的原子质量之和大于135,且化合物整体含有至少两种卤素原子类型,p为1-3,构成惯性仪器(如陀螺仪和加速度计)和电接触器的高密度浮选液和润滑剂。公开了从可用起始材料制备此类液体的合成方法。